1221675936 has 48 divisors (see below), whose sum is σ = 3453587424. Its totient is φ = 375899904.

The previous prime is 1221675899. The next prime is 1221675943. The reversal of 1221675936 is 6395761221.

It is a tau number, because it is divible by the number of its divisors (48).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 488206 + ... + 490701.

It is an arithmetic number, because the mean of its divisors is an integer number (71949738).

Almost surely, 2^1221675936 is an apocalyptic number.

1221675936 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1221675936 is an abundant number, since it is smaller than the sum of its proper divisors (2231911488).

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

1221675936 is a wasteful number, since it uses less digits than its factorization.

1221675936 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 978933 (or 978925 counting only the distinct ones).

The product of its digits is 136080, while the sum is 42.

The square root of 1221675936 is about 34952.4811136491. The cubic root of 1221675936 is about 1069.0187924589.

The spelling of 1221675936 in words is "one billion, two hundred twenty-one million, six hundred seventy-five thousand, nine hundred thirty-six".