26161251 has 4 divisors (see below), whose sum is σ = 34881672. Its totient is φ = 17440832.

The previous prime is 26161237. The next prime is 26161259. The reversal of 26161251 is 15216162.

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

It is a cyclic number.

It is not a de Polignac number, because 26161251 - 2⁷ = 26161123 is a prime.

It is a super-2 number, since 2×26161251² = 1368822107770002, which contains 22 as substring.

It is a zygodrome in base 2.

It is not an unprimeable number, because it can be changed into a prime (26161259) 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, 4360206 + ... + 4360211.

It is an arithmetic number, because the mean of its divisors is an integer number (8720418).

Almost surely, 2^26161251 is an apocalyptic number.

26161251 is a deficient number, since it is larger than the sum of its proper divisors (8720421).

26161251 is an equidigital number, since it uses as much as digits as its factorization.

26161251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8720420.

The product of its digits is 720, while the sum is 24.

The square root of 26161251 is about 5114.8070344833. The cubic root of 26161251 is about 296.8607879586.

The spelling of 26161251 in words is "twenty-six million, one hundred sixty-one thousand, two hundred fifty-one".