1260487731 has 4 divisors (see below), whose sum is σ = 1680650312. Its totient is φ = 840325152.

The previous prime is 1260487667. The next prime is 1260487747. The reversal of 1260487731 is 1377840621.

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

It is not a de Polignac number, because 1260487731 - 2⁶ = 1260487667 is a prime.

It is a super-2 number, since 2×1260487731² = 3177658640003056722, 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 1260487731.

It is not an unprimeable number, because it can be changed into a prime (1260487771) 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, 210081286 + ... + 210081291.

It is an arithmetic number, because the mean of its divisors is an integer number (420162578).

Almost surely, 2^1260487731 is an apocalyptic number.

1260487731 is a deficient number, since it is larger than the sum of its proper divisors (420162581).

1260487731 is an equidigital number, since it uses as much as digits as its factorization.

1260487731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 420162580.

The product of its (nonzero) digits is 56448, while the sum is 39.

The square root of 1260487731 is about 35503.3481660533. The cubic root of 1260487731 is about 1080.2216426105.

The spelling of 1260487731 in words is "one billion, two hundred sixty million, four hundred eighty-seven thousand, seven hundred thirty-one".