145351920 has 160 divisors (see below), whose sum is σ = 518538240. Its totient is φ = 32993280.

The previous prime is 145351907. The next prime is 145351933. The reversal of 145351920 is 29153541.

It is an interprime number because it is at equal distance from previous prime (145351907) and next prime (145351933).

It is a super-2 number, since 2×145351920² = 42254361295372800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 404701 + ... + 405059.

It is an arithmetic number, because the mean of its divisors is an integer number (3240864).

Almost surely, 2^145351920 is an apocalyptic number.

145351920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 145351920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (259269120).

145351920 is an abundant number, since it is smaller than the sum of its proper divisors (373186320).

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

145351920 is a wasteful number, since it uses less digits than its factorization.

145351920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 623 (or 617 counting only the distinct ones).

The product of its (nonzero) digits is 5400, while the sum is 30.

The square root of 145351920 is about 12056.1984057994. The cubic root of 145351920 is about 525.7834651625.

The spelling of 145351920 in words is "one hundred forty-five million, three hundred fifty-one thousand, nine hundred twenty".