1252002521 has 16 divisors (see below), whose sum is σ = 1569579648. Its totient is φ = 970185600.

The previous prime is 1252002509. The next prime is 1252002523.

It is a happy number.

1252002521 is nontrivially palindromic in base 10.

It is a cyclic number.

It is not a de Polignac number, because 1252002521 - 2¹⁴ = 1251986137 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1252002493 and 1252002502.

It is not an unprimeable number, because it can be changed into a prime (1252002523) 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, 30980 + ... + 58853.

It is an arithmetic number, because the mean of its divisors is an integer number (98098728).

Almost surely, 2^1252002521 is an apocalyptic number.

1252002521 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1252002521 is a deficient number, since it is larger than the sum of its proper divisors (317577127).

1252002521 is a wasteful number, since it uses less digits than its factorization.

1252002521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90032.

The product of its (nonzero) digits is 400, while the sum is 20.

The square root of 1252002521 is about 35383.6476497266. The cubic root of 1252002521 is about 1077.7922782023.

It can be divided in two parts, 125200 and 2521, that added together give a palindrome (127721).

The spelling of 1252002521 in words is "one billion, two hundred fifty-two million, two thousand, five hundred twenty-one".