161742674 has 8 divisors (see below), whose sum is σ = 242822988. Its totient is φ = 80801680.

The previous prime is 161742661. The next prime is 161742677. The reversal of 161742674 is 476247161.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 142444225 + 19298449 = 11935^2 + 4393^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (161742677) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31877 + ... + 36600.

Almost surely, 2^161742674 is an apocalyptic number.

161742674 is a deficient number, since it is larger than the sum of its proper divisors (81080314).

161742674 is a wasteful number, since it uses less digits than its factorization.

161742674 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69660.

The product of its digits is 56448, while the sum is 38.

The square root of 161742674 is about 12717.8093239363. The cubic root of 161742674 is about 544.8473876200.

The spelling of 161742674 in words is "one hundred sixty-one million, seven hundred forty-two thousand, six hundred seventy-four".