1225651626 has 12 divisors (see below), whose sum is σ = 2655578562. Its totient is φ = 408550536.

The previous prime is 1225651591. The next prime is 1225651627. The reversal of 1225651626 is 6261565221.

1225651626 is a `hidden beast` number, since 1 + 2 + 25 + 6 + 5 + 1 + 626 = 666.

It can be written as a sum of positive squares in only one way, i.e., 1048788225 + 176863401 = 32385^2 + 13299^2 .

It is not an unprimeable number, because it can be changed into a prime (1225651627) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 34045861 + ... + 34045896.

Almost surely, 2^1225651626 is an apocalyptic number.

1225651626 is an abundant number, since it is smaller than the sum of its proper divisors (1429926936).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1225651626 is a wasteful number, since it uses less digits than its factorization.

1225651626 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68091765 (or 68091762 counting only the distinct ones).

The product of its digits is 43200, while the sum is 36.

The square root of 1225651626 is about 35009.3077052375. The cubic root of 1225651626 is about 1070.1771698359.

The spelling of 1225651626 in words is "one billion, two hundred twenty-five million, six hundred fifty-one thousand, six hundred twenty-six".