1255723 has 10 divisors (see below), whose sum is σ = 1467724. Its totient is φ = 1074276.

The previous prime is 1255721. The next prime is 1255747. The reversal of 1255723 is 3275521.

It is not a de Polignac number, because 1255723 - 2¹ = 1255721 is a prime.

It is an Ulam number.

It is a Duffinian number.

1255723 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (1255721) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 2140 + ... + 2662.

2^1255723 is an apocalyptic number.

1255723 is a deficient number, since it is larger than the sum of its proper divisors (212001).

1255723 is an frugal number, since it uses more digits than its factorization.

1255723 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 551 (or 530 counting only the distinct ones).

The product of its digits is 2100, while the sum is 25.

The square root of 1255723 is about 1120.5904693509. The cubic root of 1255723 is about 107.8858819747.

The spelling of 1255723 in words is "one million, two hundred fifty-five thousand, seven hundred twenty-three".