1251102525 has 24 divisors (see below), whose sum is σ = 2079343104. Its totient is φ = 663753600.

The previous prime is 1251102521. The next prime is 1251102547. The reversal of 1251102525 is 5252011521.

1251102525 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 1251102525 - 2² = 1251102521 is a prime.

It is a super-2 number, since 2×1251102525² = 3130515056122751250, which contains 22 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1251102495 and 1251102504.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1251102521) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 29344 + ... + 57993.

It is an arithmetic number, because the mean of its divisors is an integer number (86639296).

Almost surely, 2^1251102525 is an apocalyptic number.

1251102525 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1251102525 is a deficient number, since it is larger than the sum of its proper divisors (828240579).

1251102525 is a wasteful number, since it uses less digits than its factorization.

1251102525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87541 (or 87536 counting only the distinct ones).

The product of its (nonzero) digits is 1000, while the sum is 24.

The square root of 1251102525 is about 35370.9276807946. The cubic root of 1251102525 is about 1077.5339610278.

The spelling of 1251102525 in words is "one billion, two hundred fifty-one million, one hundred two thousand, five hundred twenty-five".