1290531 has 8 divisors (see below), whose sum is σ = 1877184. Its totient is φ = 782120.

The previous prime is 1290503. The next prime is 1290533. The reversal of 1290531 is 1350921.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1290531 - 2⁶ = 1290467 is a prime.

It is a super-2 number, since 2×1290531² = 3330940523922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1290498 and 1290507.

It is not an unprimeable number, because it can be changed into a prime (1290533) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19521 + ... + 19586.

It is an arithmetic number, because the mean of its divisors is an integer number (234648).

2^1290531 is an apocalyptic number.

1290531 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1290531 is a deficient number, since it is larger than the sum of its proper divisors (586653).

1290531 is a wasteful number, since it uses less digits than its factorization.

1290531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39121.

The product of its (nonzero) digits is 270, while the sum is 21.

The square root of 1290531 is about 1136.0154048251. The cubic root of 1290531 is about 108.8736577258.

The spelling of 1290531 in words is "one million, two hundred ninety thousand, five hundred thirty-one".