1237531 has 2 divisors, whose sum is σ = 1237532. Its totient is φ = 1237530.

The previous prime is 1237529. The next prime is 1237543. The reversal of 1237531 is 1357321.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1237531 - 2¹ = 1237529 is a prime.

It is a super-2 number, since 2×1237531² = 3062965951922, which contains 22 as substring.

Together with 1237529, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (1237501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 618765 + 618766.

It is an arithmetic number, because the mean of its divisors is an integer number (618766).

2^1237531 is an apocalyptic number.

1237531 is the 498-th centered decagonal number.

1237531 is a deficient number, since it is larger than the sum of its proper divisors (1).

1237531 is an equidigital number, since it uses as much as digits as its factorization.

1237531 is an evil number, because the sum of its binary digits is even.

The product of its digits is 630, while the sum is 22.

The square root of 1237531 is about 1112.4437064409. The cubic root of 1237531 is about 107.3623549297.

The spelling of 1237531 in words is "one million, two hundred thirty-seven thousand, five hundred thirty-one".