1290231 has 18 divisors (see below), whose sum is σ = 1955408. Its totient is φ = 819720.

The previous prime is 1290209. The next prime is 1290257. The reversal of 1290231 is 1320921.

It is a happy number.

It is not a de Polignac number, because 1290231 - 2⁵ = 1290199 is a prime.

It is a super-2 number, since 2×1290231² = 3329392066722, which contains 22 as substring.

It is a hoax number, since the sum of its digits (18) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

1290231 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1290031) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 4626 + ... + 4896.

2^1290231 is an apocalyptic number.

1290231 is a deficient number, since it is larger than the sum of its proper divisors (665177).

1290231 is a wasteful number, since it uses less digits than its factorization.

1290231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 323 (or 297 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 18.

The square root of 1290231 is about 1135.8833566876. The cubic root of 1290231 is about 108.8652207262.

It can be divided in two parts, 1290 and 231, that added together give a square (1521 = 39²).

The spelling of 1290231 in words is "one million, two hundred ninety thousand, two hundred thirty-one".