1225687996 has 96 divisors (see below), whose sum is σ = 2458874880. Its totient is φ = 530820864.

The previous prime is 1225687993. The next prime is 1225688027. The reversal of 1225687996 is 6997865221.

It is a super-2 number, since 2×1225687996² = 3004622127076992032, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1225687993) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 11244790 + ... + 11244898.

It is an arithmetic number, because the mean of its divisors is an integer number (25613280).

Almost surely, 2^1225687996 is an apocalyptic number.

It is an amenable number.

1225687996 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

1225687996 is a wasteful number, since it uses less digits than its factorization.

1225687996 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 323 (or 321 counting only the distinct ones).

The product of its digits is 3265920, while the sum is 55.

The square root of 1225687996 is about 35009.8271346775. The cubic root of 1225687996 is about 1070.1877552143.

The spelling of 1225687996 in words is "one billion, two hundred twenty-five million, six hundred eighty-seven thousand, nine hundred ninety-six".