1270420656 has 40 divisors (see below), whose sum is σ = 3300912240. Its totient is φ = 421022976.

The previous prime is 1270420651. The next prime is 1270420673. The reversal of 1270420656 is 6560240721.

It is a super-2 number, since 2×1270420656² = 3227937286382940672, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1270420651) 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, 68191 + ... + 84798.

It is an arithmetic number, because the mean of its divisors is an integer number (82522806).

Almost surely, 2^1270420656 is an apocalyptic number.

1270420656 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1270420656 is an abundant number, since it is smaller than the sum of its proper divisors (2030491584).

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

1270420656 is a wasteful number, since it uses less digits than its factorization.

1270420656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 153173 (or 153167 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 33.

The square root of 1270420656 is about 35642.9608197748. The cubic root of 1270420656 is about 1083.0516844364.

The spelling of 1270420656 in words is "one billion, two hundred seventy million, four hundred twenty thousand, six hundred fifty-six".