1252540251 has 24 divisors (see below), whose sum is σ = 1829143680. Its totient is φ = 825866496.

The previous prime is 1252540231. The next prime is 1252540273. The reversal of 1252540251 is 1520452521.

1252540251 is a `hidden beast` number, since 1 + 252 + 5 + 402 + 5 + 1 = 666.

It is not a de Polignac number, because 1252540251 - 2⁷ = 1252540123 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1252540231) 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 23 ways as a sum of consecutive naturals, for example, 616305 + ... + 618333.

It is an arithmetic number, because the mean of its divisors is an integer number (76214320).

Almost surely, 2^1252540251 is an apocalyptic number.

1252540251 is a deficient number, since it is larger than the sum of its proper divisors (576603429).

1252540251 is a wasteful number, since it uses less digits than its factorization.

1252540251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2755 (or 2752 counting only the distinct ones).

The product of its (nonzero) digits is 4000, while the sum is 27.

The square root of 1252540251 is about 35391.2454005224. The cubic root of 1252540251 is about 1077.9465585861.

Adding to 1252540251 its reverse (1520452521), we get a palindrome (2772992772).

The spelling of 1252540251 in words is "one billion, two hundred fifty-two million, five hundred forty thousand, two hundred fifty-one".