122153642 has 32 divisors (see below), whose sum is σ = 201159504. Its totient is φ = 55296000.

The previous prime is 122153639. The next prime is 122153651. The reversal of 122153642 is 246351221.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 71757841 + 50395801 = 8471^2 + 7099^2 .

It is a Harshad number since it is a multiple of its sum of digits (26).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 475178 + ... + 475434.

Almost surely, 2^122153642 is an apocalyptic number.

122153642 is a deficient number, since it is larger than the sum of its proper divisors (79005862).

122153642 is a wasteful number, since it uses less digits than its factorization.

122153642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 554.

The product of its digits is 2880, while the sum is 26.

The square root of 122153642 is about 11052.3138753837. The cubic root of 122153642 is about 496.1756797253.

The spelling of 122153642 in words is "one hundred twenty-two million, one hundred fifty-three thousand, six hundred forty-two".