27506401 has 4 divisors (see below), whose sum is σ = 29622292. Its totient is φ = 25390512.

The previous prime is 27506363. The next prime is 27506411. The reversal of 27506401 is 10460572.

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

It can be written as a sum of positive squares in 2 ways, for example, as 2496400 + 25010001 = 1580^2 + 5001^2 .

It is a cyclic number.

It is not a de Polignac number, because 27506401 - 2⁷ = 27506273 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (27506411) 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, 1057926 + ... + 1057951.

It is an arithmetic number, because the mean of its divisors is an integer number (7405573).

Almost surely, 2^27506401 is an apocalyptic number.

It is an amenable number.

27506401 is a deficient number, since it is larger than the sum of its proper divisors (2115891).

27506401 is a wasteful number, since it uses less digits than its factorization.

27506401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2115890.

The product of its (nonzero) digits is 1680, while the sum is 25.

The square root of 27506401 is about 5244.6545167437. The cubic root of 27506401 is about 301.8639541901.

Adding to 27506401 its reverse (10460572), we get a palindrome (37966973).

The spelling of 27506401 in words is "twenty-seven million, five hundred six thousand, four hundred one".