1267531 has 2 divisors, whose sum is σ = 1267532. Its totient is φ = 1267530.

The previous prime is 1267529. The next prime is 1267549. The reversal of 1267531 is 1357621.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1267531 - 2¹ = 1267529 is a prime.

It is a super-2 number, since 2×1267531² = 3213269671922, which contains 22 as substring.

Together with 1267529, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 1267496 and 1267505.

It is not a weakly prime, because it can be changed into another prime (1267501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 633765 + 633766.

It is an arithmetic number, because the mean of its divisors is an integer number (633766).

2^1267531 is an apocalyptic number.

1267531 is a deficient number, since it is larger than the sum of its proper divisors (1).

1267531 is an equidigital number, since it uses as much as digits as its factorization.

1267531 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1260, while the sum is 25.

The square root of 1267531 is about 1125.8467924189. The cubic root of 1267531 is about 108.2229903438. Note that the first 3 decimals are identical.

The spelling of 1267531 in words is "one million, two hundred sixty-seven thousand, five hundred thirty-one".