26401157 has 2 divisors, whose sum is σ = 26401158. Its totient is φ = 26401156.

The previous prime is 26401139. The next prime is 26401201. The reversal of 26401157 is 75110462.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16859236 + 9541921 = 4106^2 + 3089^2 .

It is a cyclic number.

It is not a de Polignac number, because 26401157 - 2¹⁴ = 26384773 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (26406157) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13200578 + 13200579.

It is an arithmetic number, because the mean of its divisors is an integer number (13200579).

Almost surely, 2^26401157 is an apocalyptic number.

It is an amenable number.

26401157 is a deficient number, since it is larger than the sum of its proper divisors (1).

26401157 is an equidigital number, since it uses as much as digits as its factorization.

26401157 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 26.

The square root of 26401157 is about 5138.2056206423. The cubic root of 26401157 is about 297.7654603960.

The spelling of 26401157 in words is "twenty-six million, four hundred one thousand, one hundred fifty-seven".