161474247 has 12 divisors (see below), whose sum is σ = 254444424. Its totient is φ = 97863120.

The previous prime is 161474239. The next prime is 161474249. The reversal of 161474247 is 742474161.

It is a happy number.

161474247 is a `hidden beast` number, since 161 + 474 + 24 + 7 = 666.

It is not a de Polignac number, because 161474247 - 2³ = 161474239 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161474249) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 815428 + ... + 815625.

It is an arithmetic number, because the mean of its divisors is an integer number (21203702).

Almost surely, 2^161474247 is an apocalyptic number.

161474247 is a deficient number, since it is larger than the sum of its proper divisors (92970177).

161474247 is a wasteful number, since it uses less digits than its factorization.

161474247 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1631070 (or 1631067 counting only the distinct ones).

The product of its digits is 37632, while the sum is 36.

The square root of 161474247 is about 12707.2517485096. The cubic root of 161474247 is about 544.5458124350.

The spelling of 161474247 in words is "one hundred sixty-one million, four hundred seventy-four thousand, two hundred forty-seven".