61404971 has 4 divisors (see below), whose sum is σ = 61425000. Its totient is φ = 61384944.

The previous prime is 61404953. The next prime is 61404997. The reversal of 61404971 is 17940416.

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 61404971 - 2¹⁸ = 61142827 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61404071) 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, 4346 + ... + 11903.

It is an arithmetic number, because the mean of its divisors is an integer number (15356250).

Almost surely, 2^61404971 is an apocalyptic number.

61404971 is a deficient number, since it is larger than the sum of its proper divisors (20029).

61404971 is a wasteful number, since it uses less digits than its factorization.

61404971 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20028.

The product of its (nonzero) digits is 6048, while the sum is 32.

The square root of 61404971 is about 7836.1324006170. The cubic root of 61404971 is about 394.5189272352.

It can be divided in two parts, 6140 and 4971, that added together give a palindrome (11111).

The spelling of 61404971 in words is "sixty-one million, four hundred four thousand, nine hundred seventy-one".