1270644985 has 16 divisors (see below), whose sum is σ = 1534622400. Its totient is φ = 1009970496.

The previous prime is 1270644983. The next prime is 1270645003. The reversal of 1270644985 is 5894460721.

It is a cyclic number.

It is not a de Polignac number, because 1270644985 - 2¹ = 1270644983 is a prime.

It is a super-2 number, since 2×1270644985² = 3229077355811300450, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1270644983) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 803926 + ... + 805504.

It is an arithmetic number, because the mean of its divisors is an integer number (95913900).

Almost surely, 2^1270644985 is an apocalyptic number.

It is an amenable number.

1270644985 is a deficient number, since it is larger than the sum of its proper divisors (263977415).

1270644985 is a wasteful number, since it uses less digits than its factorization.

1270644985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2520.

The product of its (nonzero) digits is 483840, while the sum is 46.

The square root of 1270644985 is about 35646.1075715147. The cubic root of 1270644985 is about 1083.1154285727.

The spelling of 1270644985 in words is "one billion, two hundred seventy million, six hundred forty-four thousand, nine hundred eighty-five".