2391401 has 2 divisors, whose sum is σ = 2391402. Its totient is φ = 2391400.

The previous prime is 2391349. The next prime is 2391437. The reversal of 2391401 is 1041932.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2247001 + 144400 = 1499^2 + 380^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2391401 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is an Ulam number.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (2391451) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1195700 + 1195701.

It is an arithmetic number, because the mean of its divisors is an integer number (1195701).

2^2391401 is an apocalyptic number.

It is an amenable number.

2391401 is a deficient number, since it is larger than the sum of its proper divisors (1).

2391401 is an equidigital number, since it uses as much as digits as its factorization.

2391401 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 216, while the sum is 20.

The square root of 2391401 is about 1546.4155327725. The cubic root of 2391401 is about 133.7264971659.

The spelling of 2391401 in words is "two million, three hundred ninety-one thousand, four hundred one".