145431450 has 120 divisors (see below), whose sum is σ = 408483900. Its totient is φ = 38361600.

The previous prime is 145431443. The next prime is 145431463. The reversal of 145431450 is 54134541.

It is a happy number.

145431450 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 6 ways, for example, as 40717161 + 104714289 = 6381^2 + 10233^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 603330 + ... + 603570.

Almost surely, 2^145431450 is an apocalyptic number.

145431450 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 145431450, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (204241950).

145431450 is an abundant number, since it is smaller than the sum of its proper divisors (263052450).

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

145431450 is a wasteful number, since it uses less digits than its factorization.

145431450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 414 (or 400 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 27.

The square root of 145431450 is about 12059.4962581362. The cubic root of 145431450 is about 525.8793426594.

Adding to 145431450 its reverse (54134541), we get a palindrome (199565991).

The spelling of 145431450 in words is "one hundred forty-five million, four hundred thirty-one thousand, four hundred fifty".