26257057 has 4 divisors (see below), whose sum is σ = 26283796. Its totient is φ = 26230320.

The previous prime is 26257043. The next prime is 26257073. The reversal of 26257057 is 75075262.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 15492096 + 10764961 = 3936^2 + 3281^2 .

It is a cyclic number.

It is not a de Polignac number, because 26257057 - 2¹⁹ = 25732769 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (26257037) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11838 + ... + 13879.

It is an arithmetic number, because the mean of its divisors is an integer number (6570949).

Almost surely, 2^26257057 is an apocalyptic number.

It is an amenable number.

26257057 is a deficient number, since it is larger than the sum of its proper divisors (26739).

26257057 is a wasteful number, since it uses less digits than its factorization.

26257057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26738.

The product of its (nonzero) digits is 29400, while the sum is 34.

The square root of 26257057 is about 5124.1640293808. The cubic root of 26257057 is about 297.2227277962. Note that the first 3 decimals are identical.

The spelling of 26257057 in words is "twenty-six million, two hundred fifty-seven thousand, fifty-seven".