1276487131 has 2 divisors, whose sum is σ = 1276487132. Its totient is φ = 1276487130.

The previous prime is 1276487111. The next prime is 1276487141. The reversal of 1276487131 is 1317846721.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1276487131 - 2¹⁵ = 1276454363 is a prime.

It is a super-2 number, since 2×1276487131² = 3258838791217222322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1276487101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 638243565 + 638243566.

It is an arithmetic number, because the mean of its divisors is an integer number (638243566).

Almost surely, 2^1276487131 is an apocalyptic number.

1276487131 is a deficient number, since it is larger than the sum of its proper divisors (1).

1276487131 is an equidigital number, since it uses as much as digits as its factorization.

1276487131 is an evil number, because the sum of its binary digits is even.

The product of its digits is 56448, while the sum is 40.

The square root of 1276487131 is about 35727.9600733095. The cubic root of 1276487131 is about 1084.7728664408.

The spelling of 1276487131 in words is "one billion, two hundred seventy-six million, four hundred eighty-seven thousand, one hundred thirty-one".