145520432 has 20 divisors (see below), whose sum is σ = 286726440. Its totient is φ = 71526528.

The previous prime is 145520423. The next prime is 145520443. The reversal of 145520432 is 234025541.

It is a happy number.

It is a super-2 number, since 2×145520432² = 42352392258933248, which contains 22 as substring.

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 3 ways as a sum of consecutive naturals, for example, 76133 + ... + 78020.

It is an arithmetic number, because the mean of its divisors is an integer number (14336322).

Almost surely, 2^145520432 is an apocalyptic number.

It is an amenable number.

145520432 is a deficient number, since it is larger than the sum of its proper divisors (141206008).

145520432 is a wasteful number, since it uses less digits than its factorization.

145520432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 154220 (or 154214 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 26.

The square root of 145520432 is about 12063.1849857324. The cubic root of 145520432 is about 525.9865736042.

Adding to 145520432 its reverse (234025541), we get a palindrome (379545973).

The spelling of 145520432 in words is "one hundred forty-five million, five hundred twenty thousand, four hundred thirty-two".