1270421905 has 16 divisors (see below), whose sum is σ = 1591747200. Its totient is φ = 971563648.

The previous prime is 1270421869. The next prime is 1270421953. The reversal of 1270421905 is 5091240721.

It is a cyclic number.

It is not a de Polignac number, because 1270421905 - 2²⁵ = 1236867473 is a prime.

It is a super-2 number, since 2×1270421905² = 3227943633407658050, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 366621 + ... + 370069.

It is an arithmetic number, because the mean of its divisors is an integer number (99484200).

Almost surely, 2^1270421905 is an apocalyptic number.

It is an amenable number.

1270421905 is a deficient number, since it is larger than the sum of its proper divisors (321325295).

1270421905 is a wasteful number, since it uses less digits than its factorization.

1270421905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6680.

The product of its (nonzero) digits is 5040, while the sum is 31.

The square root of 1270421905 is about 35642.9783407616. The cubic root of 1270421905 is about 1083.0520393664.

The spelling of 1270421905 in words is "one billion, two hundred seventy million, four hundred twenty-one thousand, nine hundred five".