145820250 has 160 divisors (see below), whose sum is σ = 430372800. Its totient is φ = 36741600.

The previous prime is 145820239. The next prime is 145820251. The reversal of 145820250 is 52028541.

It is a happy number.

145820250 is a `hidden beast` number, since 1 + 458 + 202 + 5 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (145820251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 384561 + ... + 384939.

It is an arithmetic number, because the mean of its divisors is an integer number (2689830).

Almost surely, 2^145820250 is an apocalyptic number.

145820250 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 145820250, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (215186400).

145820250 is an abundant number, since it is smaller than the sum of its proper divisors (284552550).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

145820250 is a wasteful number, since it uses less digits than its factorization.

145820250 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 427 (or 408 counting only the distinct ones).

The product of its (nonzero) digits is 3200, while the sum is 27.

The square root of 145820250 is about 12075.6055748770. The cubic root of 145820250 is about 526.3475585648.

Adding to 145820250 its reverse (52028541), we get a palindrome (197848791).

It can be divided in two parts, 145820 and 250, that added together give a triangular number (146070 = T₅₄₀).

The spelling of 145820250 in words is "one hundred forty-five million, eight hundred twenty thousand, two hundred fifty".