1252515123 has 16 divisors (see below), whose sum is σ = 1873597440. Its totient is φ = 826901352.

The previous prime is 1252515107. The next prime is 1252515127. The reversal of 1252515123 is 3215152521.

1252515123 is a `hidden beast` number, since 1 + 2 + 525 + 15 + 123 = 666.

It is not a de Polignac number, because 1252515123 - 2⁴ = 1252515107 is a prime.

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

It is not an unprimeable number, because it can be changed into a prime (1252515127) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 222411 + ... + 227972.

It is an arithmetic number, because the mean of its divisors is an integer number (117099840).

Almost surely, 2^1252515123 is an apocalyptic number.

1252515123 is a deficient number, since it is larger than the sum of its proper divisors (621082317).

1252515123 is a wasteful number, since it uses less digits than its factorization.

1252515123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 450495 (or 450489 counting only the distinct ones).

The product of its digits is 3000, while the sum is 27.

The square root of 1252515123 is about 35390.8903956936. The cubic root of 1252515123 is about 1077.9393500826.

Adding to 1252515123 its reverse (3215152521), we get a palindrome (4467667644).

The spelling of 1252515123 in words is "one billion, two hundred fifty-two million, five hundred fifteen thousand, one hundred twenty-three".