122138506 has 32 divisors (see below), whose sum is σ = 222929280. Its totient is φ = 48992256.

The previous prime is 122138501. The next prime is 122138507. The reversal of 122138506 is 605831221.

It is not an unprimeable number, because it can be changed into a prime (122138501) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 44605 + ... + 47263.

It is an arithmetic number, because the mean of its divisors is an integer number (6966540).

Almost surely, 2^122138506 is an apocalyptic number.

122138506 is a deficient number, since it is larger than the sum of its proper divisors (100790774).

122138506 is a wasteful number, since it uses less digits than its factorization.

122138506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2878.

The product of its (nonzero) digits is 2880, while the sum is 28.

The square root of 122138506 is about 11051.6291106787. The cubic root of 122138506 is about 496.1551852475.

Adding to 122138506 its reverse (605831221), we get a palindrome (727969727).

The spelling of 122138506 in words is "one hundred twenty-two million, one hundred thirty-eight thousand, five hundred six".