1272631 has 2 divisors, whose sum is σ = 1272632. Its totient is φ = 1272630.

The previous prime is 1272629. The next prime is 1272641. The reversal of 1272631 is 1362721.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1272631 - 2¹ = 1272629 is a prime.

It is a super-2 number, since 2×1272631² = 3239179324322, which contains 22 as substring.

Together with 1272629, it forms a pair of twin primes.

1272631 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1272641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 636315 + 636316.

It is an arithmetic number, because the mean of its divisors is an integer number (636316).

2^1272631 is an apocalyptic number.

1272631 is a deficient number, since it is larger than the sum of its proper divisors (1).

1272631 is an equidigital number, since it uses as much as digits as its factorization.

1272631 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 504, while the sum is 22.

The square root of 1272631 is about 1128.1094805027. The cubic root of 1272631 is about 108.3679437081.

The spelling of 1272631 in words is "one million, two hundred seventy-two thousand, six hundred thirty-one".