145513252 has 12 divisors (see below), whose sum is σ = 256271260. Its totient is φ = 72292896.

The previous prime is 145513231. The next prime is 145513301. The reversal of 145513252 is 252315541.

It can be written as a sum of positive squares in 2 ways, for example, as 90516196 + 54997056 = 9514^2 + 7416^2 .

It is a super-3 number, since 3×145513252³ (a number of 25 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 145513252.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 115227 + ... + 116482.

Almost surely, 2^145513252 is an apocalyptic number.

It is an amenable number.

145513252 is a deficient number, since it is larger than the sum of its proper divisors (110758008).

145513252 is a wasteful number, since it uses less digits than its factorization.

145513252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 231870 (or 231868 counting only the distinct ones).

The product of its digits is 6000, while the sum is 28.

The square root of 145513252 is about 12062.8873823807. The cubic root of 145513252 is about 525.9779227097.

Adding to 145513252 its reverse (252315541), we get a palindrome (397828793).

The spelling of 145513252 in words is "one hundred forty-five million, five hundred thirteen thousand, two hundred fifty-two".