125421122 has 6 divisors (see below), whose sum is σ = 188155443. Its totient is φ = 62702642.

The previous prime is 125421059. The next prime is 125421137. The reversal of 125421122 is 221124521.

It can be written as a sum of positive squares in only one way, i.e., 62710561 + 62710561 = 7919^2 + 7919^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=7919.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 125421094 and 125421103.

It is an unprimeable number.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 11879 + ... + 19797.

Almost surely, 2^125421122 is an apocalyptic number.

125421122 is a deficient number, since it is larger than the sum of its proper divisors (62734321).

125421122 is an frugal number, since it uses more digits than its factorization.

125421122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15840 (or 7921 counting only the distinct ones).

The product of its digits is 320, while the sum is 20.

The square root of 125421122 is about 11199.1572004325. The cubic root of 125421122 is about 500.5608666220.

Adding to 125421122 its reverse (221124521), we get a palindrome (346545643).

The spelling of 125421122 in words is "one hundred twenty-five million, four hundred twenty-one thousand, one hundred twenty-two".