2501647 has 2 divisors, whose sum is σ = 2501648. Its totient is φ = 2501646.

The previous prime is 2501623. The next prime is 2501651. The reversal of 2501647 is 7461052.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2501647 - 2¹¹ = 2499599 is a prime.

2501647 is a lucky number.

It is a congruent number.

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, 1250823 + 1250824.

It is an arithmetic number, because the mean of its divisors is an integer number (1250824).

2^2501647 is an apocalyptic number.

2501647 is a deficient number, since it is larger than the sum of its proper divisors (1).

2501647 is an equidigital number, since it uses as much as digits as its factorization.

2501647 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1680, while the sum is 25.

The square root of 2501647 is about 1581.6595714628. The cubic root of 2501647 is about 135.7506785925.

Adding to 2501647 its reverse (7461052), we get a palindrome (9962699).

The spelling of 2501647 in words is "two million, five hundred one thousand, six hundred forty-seven".