1252520311 has 36 divisors (see below), whose sum is σ = 1531849464. Its totient is φ = 1020872160.

The previous prime is 1252520303. The next prime is 1252520317. The reversal of 1252520311 is 1130252521.

It is not a de Polignac number, because 1252520311 - 2³ = 1252520303 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1252520317) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 3154765 + ... + 3155161.

It is an arithmetic number, because the mean of its divisors is an integer number (42551374).

Almost surely, 2^1252520311 is an apocalyptic number.

1252520311 is a deficient number, since it is larger than the sum of its proper divisors (279329153).

1252520311 is an equidigital number, since it uses as much as digits as its factorization.

1252520311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 540 (or 502 counting only the distinct ones).

The product of its (nonzero) digits is 600, while the sum is 22.

The square root of 1252520311 is about 35390.9636913153. The cubic root of 1252520311 is about 1077.9408383791.

Adding to 1252520311 its reverse (1130252521), we get a palindrome (2382772832).

The spelling of 1252520311 in words is "one billion, two hundred fifty-two million, five hundred twenty thousand, three hundred eleven".