1258531 has 2 divisors, whose sum is σ = 1258532. Its totient is φ = 1258530.

The previous prime is 1258511. The next prime is 1258559. The reversal of 1258531 is 1358521.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1258531 - 2⁷ = 1258403 is a prime.

It is a super-2 number, since 2×1258531² = 3167800555922, which contains 22 as substring.

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 1258496 and 1258505.

It is not a weakly prime, because it can be changed into another prime (1258511) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 629265 + 629266.

It is an arithmetic number, because the mean of its divisors is an integer number (629266).

2^1258531 is an apocalyptic number.

1258531 is a deficient number, since it is larger than the sum of its proper divisors (1).

1258531 is an equidigital number, since it uses as much as digits as its factorization.

1258531 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1200, while the sum is 25.

The square root of 1258531 is about 1121.8426805930. The cubic root of 1258531 is about 107.9662388757.

The spelling of 1258531 in words is "one million, two hundred fifty-eight thousand, five hundred thirty-one".