1213906956 has 24 divisors (see below), whose sum is σ = 2864277360. Its totient is φ = 400088832.

The previous prime is 1213906943. The next prime is 1213906957. The reversal of 1213906956 is 6596093121.

It is not an unprimeable number, because it can be changed into a prime (1213906957) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 567241 + ... + 569376.

It is an arithmetic number, because the mean of its divisors is an integer number (119344890).

Almost surely, 2^1213906956 is an apocalyptic number.

It is an amenable number.

1213906956 is an abundant number, since it is smaller than the sum of its proper divisors (1650370404).

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

1213906956 is a wasteful number, since it uses less digits than its factorization.

1213906956 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1136713 (or 1136711 counting only the distinct ones).

The product of its (nonzero) digits is 87480, while the sum is 42.

The square root of 1213906956 is about 34841.1675464529. The cubic root of 1213906956 is about 1066.7479084389.

The spelling of 1213906956 in words is "one billion, two hundred thirteen million, nine hundred six thousand, nine hundred fifty-six".