26121961 has 8 divisors (see below), whose sum is σ = 26869248. Its totient is φ = 25380000.

The previous prime is 26121947. The next prime is 26121967. The reversal of 26121961 is 16912162.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 26121961 - 2⁷ = 26121833 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (26121967) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9936 + ... + 12286.

It is an arithmetic number, because the mean of its divisors is an integer number (3358656).

Almost surely, 2^26121961 is an apocalyptic number.

It is an amenable number.

26121961 is a deficient number, since it is larger than the sum of its proper divisors (747287).

26121961 is a wasteful number, since it uses less digits than its factorization.

26121961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2663.

The product of its digits is 1296, while the sum is 28.

The square root of 26121961 is about 5110.9647817217. The cubic root of 26121961 is about 296.7121010805.

It can be divided in two parts, 261 and 21961, that added together give a palindrome (22222).

The spelling of 26121961 in words is "twenty-six million, one hundred twenty-one thousand, nine hundred sixty-one".