1222991925 has 12 divisors (see below), whose sum is σ = 2022013440. Its totient is φ = 652262320.

The previous prime is 1222991923. The next prime is 1222991929. The reversal of 1222991925 is 5291992221.

It is not a de Polignac number, because 1222991925 - 2¹ = 1222991923 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1222991921) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8153205 + ... + 8153354.

It is an arithmetic number, because the mean of its divisors is an integer number (168501120).

Almost surely, 2^1222991925 is an apocalyptic number.

1222991925 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1222991925 is a deficient number, since it is larger than the sum of its proper divisors (799021515).

1222991925 is a wasteful number, since it uses less digits than its factorization.

1222991925 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16306572 (or 16306567 counting only the distinct ones).

The product of its digits is 58320, while the sum is 42.

The square root of 1222991925 is about 34971.3014484734. The cubic root of 1222991925 is about 1069.4025036356.

The spelling of 1222991925 in words is "one billion, two hundred twenty-two million, nine hundred ninety-one thousand, nine hundred twenty-five".