26172149 has 4 divisors (see below), whose sum is σ = 26182464. Its totient is φ = 26161836.

The previous prime is 26172131. The next prime is 26172169. The reversal of 26172149 is 94127162.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-26172149 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26172169) 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, 1604 + ... + 7410.

It is an arithmetic number, because the mean of its divisors is an integer number (6545616).

Almost surely, 2^26172149 is an apocalyptic number.

It is an amenable number.

26172149 is a deficient number, since it is larger than the sum of its proper divisors (10315).

26172149 is an equidigital number, since it uses as much as digits as its factorization.

26172149 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10314.

The product of its digits is 6048, while the sum is 32.

The square root of 26172149 is about 5115.8722618924. The cubic root of 26172149 is about 296.9020033646.

The spelling of 26172149 in words is "twenty-six million, one hundred seventy-two thousand, one hundred forty-nine".