1275387487 has 4 divisors (see below), whose sum is σ = 1391331816. Its totient is φ = 1159443160.

The previous prime is 1275387427. The next prime is 1275387493. The reversal of 1275387487 is 7847835721.

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

It is a cyclic number.

It is not a de Polignac number, because 1275387487 - 2¹¹ = 1275385439 is a prime.

It is a super-2 number, since 2×1275387487² = 3253226483992350338, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1275387427) 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, 57972148 + ... + 57972169.

It is an arithmetic number, because the mean of its divisors is an integer number (347832954).

Almost surely, 2^1275387487 is an apocalyptic number.

1275387487 is a deficient number, since it is larger than the sum of its proper divisors (115944329).

1275387487 is a wasteful number, since it uses less digits than its factorization.

1275387487 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 115944328.

The product of its digits is 2634240, while the sum is 52.

The square root of 1275387487 is about 35712.5676338177. The cubic root of 1275387487 is about 1084.4612804106.

The spelling of 1275387487 in words is "one billion, two hundred seventy-five million, three hundred eighty-seven thousand, four hundred eighty-seven".