122821725 has 48 divisors (see below), whose sum is σ = 228235392. Its totient is φ = 57826560.

The previous prime is 122821703. The next prime is 122821781. The reversal of 122821725 is 527128221.

It is not a de Polignac number, because 122821725 - 2⁶ = 122821661 is a prime.

It is a super-2 number, since 2×122821725² = 30170352263951250, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 122821692 and 122821701.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 19687 + ... + 25163.

It is an arithmetic number, because the mean of its divisors is an integer number (4754904).

Almost surely, 2^122821725 is an apocalyptic number.

122821725 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

122821725 is a deficient number, since it is larger than the sum of its proper divisors (105413667).

122821725 is a wasteful number, since it uses less digits than its factorization.

122821725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5526 (or 5521 counting only the distinct ones).

The product of its digits is 4480, while the sum is 30.

The square root of 122821725 is about 11082.4963343102. The cubic root of 122821725 is about 497.0785973909.

Adding to 122821725 its reverse (527128221), we get a palindrome (649949946).

The spelling of 122821725 in words is "one hundred twenty-two million, eight hundred twenty-one thousand, seven hundred twenty-five".