1220474871 has 80 divisors (see below), whose sum is σ = 2302755840. Its totient is φ = 625734720.

The previous prime is 1220474821. The next prime is 1220474873. The reversal of 1220474871 is 1784740221.

It is not a de Polignac number, because 1220474871 - 2¹⁰ = 1220473847 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220474873) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 491485 + ... + 493961.

It is an arithmetic number, because the mean of its divisors is an integer number (28784448).

Almost surely, 2^1220474871 is an apocalyptic number.

1220474871 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1220474871 is a deficient number, since it is larger than the sum of its proper divisors (1082280969).

1220474871 is a wasteful number, since it uses less digits than its factorization.

1220474871 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2586 (or 2577 counting only the distinct ones).

The product of its (nonzero) digits is 25088, while the sum is 36.

The square root of 1220474871 is about 34935.2954903776. The cubic root of 1220474871 is about 1068.6683498103.

The spelling of 1220474871 in words is "one billion, two hundred twenty million, four hundred seventy-four thousand, eight hundred seventy-one".