145405252 has 24 divisors (see below), whose sum is σ = 276496640. Its totient is φ = 66653280.

The previous prime is 145405243. The next prime is 145405277. The reversal of 145405252 is 252504541.

It is a super-2 number, since 2×145405252² = 42285374618367008, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 145405252.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28503 + ... + 33214.

Almost surely, 2^145405252 is an apocalyptic number.

It is an amenable number.

145405252 is a deficient number, since it is larger than the sum of its proper divisors (131091388).

145405252 is a wasteful number, since it uses less digits than its factorization.

145405252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61771 (or 61769 counting only the distinct ones).

The product of its (nonzero) digits is 8000, while the sum is 28.

The square root of 145405252 is about 12058.4100112743. The cubic root of 145405252 is about 525.8477634873.

Adding to 145405252 its reverse (252504541), we get a palindrome (397909793).

The spelling of 145405252 in words is "one hundred forty-five million, four hundred five thousand, two hundred fifty-two".