1225137684 has 24 divisors (see below), whose sum is σ = 2897816320. Its totient is φ = 402784704.

The previous prime is 1225137677. The next prime is 1225137703. The reversal of 1225137684 is 4867315221.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 698404 + ... + 700155.

Almost surely, 2^1225137684 is an apocalyptic number.

It is an amenable number.

1225137684 is an abundant number, since it is smaller than the sum of its proper divisors (1672678636).

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

1225137684 is a wasteful number, since it uses less digits than its factorization.

1225137684 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1398639 (or 1398637 counting only the distinct ones).

The product of its digits is 80640, while the sum is 39.

The square root of 1225137684 is about 35001.9668590209. The cubic root of 1225137684 is about 1070.0275661807.

The spelling of 1225137684 in words is "one billion, two hundred twenty-five million, one hundred thirty-seven thousand, six hundred eighty-four".