122971642 has 8 divisors (see below), whose sum is σ = 195307956. Its totient is φ = 57868992.

The previous prime is 122971631. The next prime is 122971643. The reversal of 122971642 is 246179221.

It can be written as a sum of positive squares in 2 ways, for example, as 109641841 + 13329801 = 10471^2 + 3651^2 .

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

It is a Harshad number since it is a multiple of its sum of digits (34), and also a Moran number because the ratio is a prime number: 3616813 = 122971642 / (1 + 2 + 2 + 9 + 7 + 1 + 6 + 4 + 2).

It is a junction number, because it is equal to n+sod(n) for n = 122971598 and 122971607.

It is not an unprimeable number, because it can be changed into a prime (122971643) 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, 1808373 + ... + 1808440.

Almost surely, 2^122971642 is an apocalyptic number.

122971642 is a deficient number, since it is larger than the sum of its proper divisors (72336314).

122971642 is a wasteful number, since it uses less digits than its factorization.

122971642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3616832.

The product of its digits is 12096, while the sum is 34.

The square root of 122971642 is about 11089.2579553368. The cubic root of 122971642 is about 497.2807609537.

The spelling of 122971642 in words is "one hundred twenty-two million, nine hundred seventy-one thousand, six hundred forty-two".