10402649 has 2 divisors, whose sum is σ = 10402650. Its totient is φ = 10402648.

The previous prime is 10402631. The next prime is 10402669. The reversal of 10402649 is 94620401.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9412624 + 990025 = 3068^2 + 995^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-10402649 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (10402669) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5201324 + 5201325.

It is an arithmetic number, because the mean of its divisors is an integer number (5201325).

Almost surely, 2^10402649 is an apocalyptic number.

It is an amenable number.

10402649 is a deficient number, since it is larger than the sum of its proper divisors (1).

10402649 is an equidigital number, since it uses as much as digits as its factorization.

10402649 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1728, while the sum is 26.

The square root of 10402649 is about 3225.3137831845. The cubic root of 10402649 is about 218.2971077296.

The spelling of 10402649 in words is "ten million, four hundred two thousand, six hundred forty-nine".