2501651 has 2 divisors, whose sum is σ = 2501652. Its totient is φ = 2501650.

The previous prime is 2501647. The next prime is 2501657. The reversal of 2501651 is 1561052.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2501651 - 2² = 2501647 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (2501657) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1250825 + 1250826.

It is an arithmetic number, because the mean of its divisors is an integer number (1250826).

2^2501651 is an apocalyptic number.

2501651 is a deficient number, since it is larger than the sum of its proper divisors (1).

2501651 is an equidigital number, since it uses as much as digits as its factorization.

2501651 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 300, while the sum is 20.

The square root of 2501651 is about 1581.6608359569. The cubic root of 2501651 is about 135.7507509452.

The spelling of 2501651 in words is "two million, five hundred one thousand, six hundred fifty-one".