1251025651 has 2 divisors, whose sum is σ = 1251025652. Its totient is φ = 1251025650.

The previous prime is 1251025619. The next prime is 1251025667. The reversal of 1251025651 is 1565201521.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1251025651 - 2⁵ = 1251025619 is a prime.

It is not a weakly prime, because it can be changed into another prime (1251020651) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 625512825 + 625512826.

It is an arithmetic number, because the mean of its divisors is an integer number (625512826).

Almost surely, 2^1251025651 is an apocalyptic number.

1251025651 is a deficient number, since it is larger than the sum of its proper divisors (1).

1251025651 is an equidigital number, since it uses as much as digits as its factorization.

1251025651 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3000, while the sum is 28.

The square root of 1251025651 is about 35369.8409806999. The cubic root of 1251025651 is about 1077.5118908829.

The spelling of 1251025651 in words is "one billion, two hundred fifty-one million, twenty-five thousand, six hundred fifty-one".