1270434691 has 4 divisors (see below), whose sum is σ = 1270563592. Its totient is φ = 1270305792.

The previous prime is 1270434673. The next prime is 1270434707. The reversal of 1270434691 is 1964340721.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1270434691 is a prime.

It is a super-2 number, since 2×1270434691² = 3228008608192530962, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1270434691.

It is not an unprimeable number, because it can be changed into a prime (1270434091) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 48321 + ... + 69826.

It is an arithmetic number, because the mean of its divisors is an integer number (317640898).

Almost surely, 2^1270434691 is an apocalyptic number.

1270434691 is a deficient number, since it is larger than the sum of its proper divisors (128901).

1270434691 is a wasteful number, since it uses less digits than its factorization.

1270434691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128900.

The product of its (nonzero) digits is 36288, while the sum is 37.

The square root of 1270434691 is about 35643.1577024259. The cubic root of 1270434691 is about 1083.0556727675.

The spelling of 1270434691 in words is "one billion, two hundred seventy million, four hundred thirty-four thousand, six hundred ninety-one".