61871247 has 6 divisors (see below), whose sum is σ = 89369592. Its totient is φ = 41247492.

The previous prime is 61871237. The next prime is 61871269. The reversal of 61871247 is 74217816.

It is not a de Polignac number, because 61871247 - 2⁷ = 61871119 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61871237) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3437283 + ... + 3437300.

It is an arithmetic number, because the mean of its divisors is an integer number (14894932).

Almost surely, 2^61871247 is an apocalyptic number.

61871247 is a deficient number, since it is larger than the sum of its proper divisors (27498345).

61871247 is a wasteful number, since it uses less digits than its factorization.

61871247 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6874589 (or 6874586 counting only the distinct ones).

The product of its digits is 18816, while the sum is 36.

The square root of 61871247 is about 7865.8278013188. The cubic root of 61871247 is about 395.5149977558.

The spelling of 61871247 in words is "sixty-one million, eight hundred seventy-one thousand, two hundred forty-seven".