2639401 has 2 divisors, whose sum is σ = 2639402. Its totient is φ = 2639400.

The previous prime is 2639393. The next prime is 2639407. The reversal of 2639401 is 1049362.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2637376 + 2025 = 1624^2 + 45^2 .

It is a cyclic number.

It is not a de Polignac number, because 2639401 - 2³ = 2639393 is a prime.

It is not a weakly prime, because it can be changed into another prime (2639407) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1319700 + 1319701.

It is an arithmetic number, because the mean of its divisors is an integer number (1319701).

2^2639401 is an apocalyptic number.

It is an amenable number.

2639401 is a deficient number, since it is larger than the sum of its proper divisors (1).

2639401 is an equidigital number, since it uses as much as digits as its factorization.

2639401 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1296, while the sum is 25.

The square root of 2639401 is about 1624.6233409625. The cubic root of 2639401 is about 138.1980109219.

The spelling of 2639401 in words is "two million, six hundred thirty-nine thousand, four hundred one".