26407561 has 8 divisors (see below), whose sum is σ = 27241344. Its totient is φ = 25585200.

The previous prime is 26407553. The next prime is 26407573. The reversal of 26407561 is 16570462.

It is a happy number.

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 26407561 - 2³ = 26407553 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (26407501) 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, 1966 + ... + 7528.

It is an arithmetic number, because the mean of its divisors is an integer number (3405168).

Almost surely, 2^26407561 is an apocalyptic number.

It is an amenable number.

26407561 is a deficient number, since it is larger than the sum of its proper divisors (833783).

26407561 is a wasteful number, since it uses less digits than its factorization.

26407561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5711.

The product of its (nonzero) digits is 10080, while the sum is 31.

The square root of 26407561 is about 5138.8287576062. The cubic root of 26407561 is about 297.7895342885.

It can be divided in two parts, 2640 and 7561, that added together give a palindrome (10201).

The spelling of 26407561 in words is "twenty-six million, four hundred seven thousand, five hundred sixty-one".