145121252 has 12 divisors (see below), whose sum is σ = 260826300. Its totient is φ = 70599456.

The previous prime is 145121243. The next prime is 145121269. The reversal of 145121252 is 252121541.

It can be written as a sum of positive squares in 2 ways, for example, as 88661056 + 56460196 = 9416^2 + 7514^2 .

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, 490127 + ... + 490422.

It is an arithmetic number, because the mean of its divisors is an integer number (21735525).

Almost surely, 2^145121252 is an apocalyptic number.

It is an amenable number.

145121252 is a deficient number, since it is larger than the sum of its proper divisors (115705048).

145121252 is a wasteful number, since it uses less digits than its factorization.

145121252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 980590 (or 980588 counting only the distinct ones).

The product of its digits is 800, while the sum is 23.

The square root of 145121252 is about 12046.6282419605. The cubic root of 145121252 is about 525.5051850790.

Adding to 145121252 its reverse (252121541), we get a palindrome (397242793).

The spelling of 145121252 in words is "one hundred forty-five million, one hundred twenty-one thousand, two hundred fifty-two".