122820742 has 32 divisors (see below), whose sum is σ = 208915200. Its totient is φ = 53642400.

The previous prime is 122820739. The next prime is 122820743. The reversal of 122820742 is 247028221.

It is a self number, because there is not a number n which added to its sum of digits gives 122820742.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122820743) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 198109 + ... + 198727.

It is an arithmetic number, because the mean of its divisors is an integer number (6528600).

Almost surely, 2^122820742 is an apocalyptic number.

122820742 is a deficient number, since it is larger than the sum of its proper divisors (86094458).

122820742 is a wasteful number, since it uses less digits than its factorization.

122820742 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 972.

The product of its (nonzero) digits is 3584, while the sum is 28.

The square root of 122820742 is about 11082.4519850076. The cubic root of 122820742 is about 497.0772712695.

Adding to 122820742 its reverse (247028221), we get a palindrome (369848963).

The spelling of 122820742 in words is "one hundred twenty-two million, eight hundred twenty thousand, seven hundred forty-two".