61404265 has 16 divisors (see below), whose sum is σ = 81292176. Its totient is φ = 44236800.

The previous prime is 61404253. The next prime is 61404283. The reversal of 61404265 is 56240416.

It can be written as a sum of positive squares in 8 ways, for example, as 26132544 + 35271721 = 5112^2 + 5939^2 .

It is a de Polignac number, because none of the positive numbers 2^k-61404265 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8856 + ... + 14185.

It is an arithmetic number, because the mean of its divisors is an integer number (5080761).

Almost surely, 2^61404265 is an apocalyptic number.

61404265 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

61404265 is a deficient number, since it is larger than the sum of its proper divisors (19887911).

61404265 is a wasteful number, since it uses less digits than its factorization.

61404265 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23100.

The product of its (nonzero) digits is 5760, while the sum is 28.

The square root of 61404265 is about 7836.0873527546. The cubic root of 61404265 is about 394.5174152434.

The spelling of 61404265 in words is "sixty-one million, four hundred four thousand, two hundred sixty-five".