1252157427 has 16 divisors (see below), whose sum is σ = 1856000160. Its totient is φ = 834343200.

The previous prime is 1252157419. The next prime is 1252157429. The reversal of 1252157427 is 7247512521.

1252157427 is a `hidden beast` number, since 12 + 5 + 215 + 7 + 427 = 666.

It is not a de Polignac number, because 1252157427 - 2³ = 1252157419 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1252157391 and 1252157400.

It is not an unprimeable number, because it can be changed into a prime (1252157429) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 46977 + ... + 68637.

It is an arithmetic number, because the mean of its divisors is an integer number (116000010).

Almost surely, 2^1252157427 is an apocalyptic number.

1252157427 is a deficient number, since it is larger than the sum of its proper divisors (603842733).

1252157427 is a wasteful number, since it uses less digits than its factorization.

1252157427 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23811 (or 23805 counting only the distinct ones).

The product of its digits is 39200, while the sum is 36.

The square root of 1252157427 is about 35385.8365310190. The cubic root of 1252157427 is about 1077.8367268895.

Adding to 1252157427 its reverse (7247512521), we get a palindrome (8499669948).

The spelling of 1252157427 in words is "one billion, two hundred fifty-two million, one hundred fifty-seven thousand, four hundred twenty-seven".