122991746 has 4 divisors (see below), whose sum is σ = 184487622. Its totient is φ = 61495872.

The previous prime is 122991709. The next prime is 122991749. The reversal of 122991746 is 647199221.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 647199221 = 5147 ⋅125743.

It can be written as a sum of positive squares in only one way, i.e., 121330225 + 1661521 = 11015^2 + 1289^2 .

It is not an unprimeable number, because it can be changed into a prime (122991749) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30747935 + ... + 30747938.

Almost surely, 2^122991746 is an apocalyptic number.

122991746 is a deficient number, since it is larger than the sum of its proper divisors (61495876).

122991746 is an equidigital number, since it uses as much as digits as its factorization.

122991746 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61495875.

The product of its digits is 54432, while the sum is 41.

The square root of 122991746 is about 11090.1643811082. The cubic root of 122991746 is about 497.3078587667.

The spelling of 122991746 in words is "one hundred twenty-two million, nine hundred ninety-one thousand, seven hundred forty-six".