1275731 has 8 divisors (see below), whose sum is σ = 1365984. Its totient is φ = 1187200.

The previous prime is 1275719. The next prime is 1275737. The reversal of 1275731 is 1375721.

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 1275731 - 2⁶ = 1275667 is a prime.

It is a super-2 number, since 2×1275731² = 3254979168722, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1275731.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1275737) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1346 + ... + 2088.

It is an arithmetic number, because the mean of its divisors is an integer number (170748).

2^1275731 is an apocalyptic number.

1275731 is a deficient number, since it is larger than the sum of its proper divisors (90253).

1275731 is a wasteful number, since it uses less digits than its factorization.

With its predecessor (1275730) it forms a Ruth-Aaron pair, since the sum of their distinct prime factors is the same (861).

1275731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 861.

The product of its digits is 1470, while the sum is 26.

The square root of 1275731 is about 1129.4826249217. The cubic root of 1275731 is about 108.4558634642.

The spelling of 1275731 in words is "one million, two hundred seventy-five thousand, seven hundred thirty-one".