2636401 has 2 divisors, whose sum is σ = 2636402. Its totient is φ = 2636400.

The previous prime is 2636369. The next prime is 2636407. The reversal of 2636401 is 1046362.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1638400 + 998001 = 1280^2 + 999^2 .

It is a cyclic number.

It is not a de Polignac number, because 2636401 - 2⁵ = 2636369 is a prime.

It is a super-2 number, since 2×2636401² = 13901220465602, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2636407) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1318200 + 1318201.

It is an arithmetic number, because the mean of its divisors is an integer number (1318201).

2^2636401 is an apocalyptic number.

It is an amenable number.

2636401 is a deficient number, since it is larger than the sum of its proper divisors (1).

2636401 is an equidigital number, since it uses as much as digits as its factorization.

2636401 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 864, while the sum is 22.

The square root of 2636401 is about 1623.6997875223. The cubic root of 2636401 is about 138.1456314602.

The spelling of 2636401 in words is "two million, six hundred thirty-six thousand, four hundred one".