1268531 has 4 divisors (see below), whose sum is σ = 1383864. Its totient is φ = 1153200.

The previous prime is 1268479. The next prime is 1268537. The reversal of 1268531 is 1358621.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1268531 - 2⁶ = 1268467 is a prime.

It is a super-2 number, since 2×1268531² = 3218341795922, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1268531.

It is not an unprimeable number, because it can be changed into a prime (1268537) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 57650 + ... + 57671.

It is an arithmetic number, because the mean of its divisors is an integer number (345966).

2^1268531 is an apocalyptic number.

1268531 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1268531 is a deficient number, since it is larger than the sum of its proper divisors (115333).

1268531 is a wasteful number, since it uses less digits than its factorization.

1268531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 115332.

The product of its digits is 1440, while the sum is 26.

The square root of 1268531 is about 1126.2908150207. The cubic root of 1268531 is about 108.2514431765.

The spelling of 1268531 in words is "one million, two hundred sixty-eight thousand, five hundred thirty-one".