1201279856 has 40 divisors (see below), whose sum is σ = 2664841344. Its totient is φ = 513892800.

The previous prime is 1201279843. The next prime is 1201279867. The reversal of 1201279856 is 6589721021.

It is a congruent number.

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, 53531 + ... + 72581.

Almost surely, 2^1201279856 is an apocalyptic number.

1201279856 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1201279856 is an abundant number, since it is smaller than the sum of its proper divisors (1463561488).

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

1201279856 is a wasteful number, since it uses less digits than its factorization.

1201279856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19629 (or 19623 counting only the distinct ones).

The product of its (nonzero) digits is 60480, while the sum is 41.

The square root of 1201279856 is about 34659.4843585417. The cubic root of 1201279856 is about 1063.0362266029.

The spelling of 1201279856 in words is "one billion, two hundred one million, two hundred seventy-nine thousand, eight hundred fifty-six".