26261901 has 20 divisors (see below), whose sum is σ = 39385500. Its totient is φ = 17438976.

The previous prime is 26261899. The next prime is 26261909. The reversal of 26261901 is 10916262.

It can be written as a sum of positive squares in 2 ways, for example, as 7986276 + 18275625 = 2826^2 + 4275^2 .

It is not a de Polignac number, because 26261901 - 2¹ = 26261899 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26261909) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 27805 + ... + 28733.

It is an arithmetic number, because the mean of its divisors is an integer number (1969275).

Almost surely, 2^26261901 is an apocalyptic number.

It is an amenable number.

26261901 is a deficient number, since it is larger than the sum of its proper divisors (13123599).

26261901 is an equidigital number, since it uses as much as digits as its factorization.

26261901 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1290 (or 1281 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 27.

The square root of 26261901 is about 5124.6366700479. The cubic root of 26261901 is about 297.2410042588.

The spelling of 26261901 in words is "twenty-six million, two hundred sixty-one thousand, nine hundred one".