26691025 has 12 divisors (see below), whose sum is σ = 33342732. Its totient is φ = 21194240.

The previous prime is 26691013. The next prime is 26691047. The reversal of 26691025 is 52019662.

It can be written as a sum of positive squares in 6 ways, for example, as 1218816 + 25472209 = 1104^2 + 5047^2 .

It is not a de Polignac number, because 26691025 - 2⁷ = 26690897 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 472 + ... + 7321.

It is an arithmetic number, because the mean of its divisors is an integer number (2778561).

Almost surely, 2^26691025 is an apocalyptic number.

26691025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

26691025 is a deficient number, since it is larger than the sum of its proper divisors (6651707).

26691025 is a wasteful number, since it uses less digits than its factorization.

26691025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7940 (or 7935 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 31.

The square root of 26691025 is about 5166.3357420903. The cubic root of 26691025 is about 298.8512550460.

The spelling of 26691025 in words is "twenty-six million, six hundred ninety-one thousand, twenty-five".