1225665876 has 24 divisors (see below), whose sum is σ = 2867364864. Its totient is φ = 407487040.

The previous prime is 1225665871. The next prime is 1225665899. The reversal of 1225665876 is 6785665221.

It is a happy number.

It is a hoax number, since the sum of its digits (48) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1225665871) 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 7 ways as a sum of consecutive naturals, for example, 128745 + ... + 137936.

It is an arithmetic number, because the mean of its divisors is an integer number (119473536).

Almost surely, 2^1225665876 is an apocalyptic number.

It is an amenable number.

1225665876 is an abundant number, since it is smaller than the sum of its proper divisors (1641698988).

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

1225665876 is a wasteful number, since it uses less digits than its factorization.

1225665876 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 267071 (or 267069 counting only the distinct ones).

The product of its digits is 1209600, while the sum is 48.

The square root of 1225665876 is about 35009.5112219522. The cubic root of 1225665876 is about 1070.1813172802.

The spelling of 1225665876 in words is "one billion, two hundred twenty-five million, six hundred sixty-five thousand, eight hundred seventy-six".