122538647 has 24 divisors (see below), whose sum is σ = 155326080. Its totient is φ = 93911760.

The previous prime is 122538631. The next prime is 122538649. The reversal of 122538647 is 746835221.

It is a happy number.

It is not a de Polignac number, because 122538647 - 2⁴ = 122538631 is a prime.

It is a Smith number, since the sum of its digits (38) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 122538647.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122538649) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 881504 + ... + 881642.

It is an arithmetic number, because the mean of its divisors is an integer number (6471920).

Almost surely, 2^122538647 is an apocalyptic number.

122538647 is a deficient number, since it is larger than the sum of its proper divisors (32787433).

122538647 is a wasteful number, since it uses less digits than its factorization.

122538647 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 371 (or 264 counting only the distinct ones).

The product of its digits is 80640, while the sum is 38.

The square root of 122538647 is about 11069.7175664061. The cubic root of 122538647 is about 496.6964167476.

The spelling of 122538647 in words is "one hundred twenty-two million, five hundred thirty-eight thousand, six hundred forty-seven".