1295721 has 24 divisors (see below), whose sum is σ = 2169024. Its totient is φ = 730080.

The previous prime is 1295717. The next prime is 1295737. The reversal of 1295721 is 1275921.

It is not a de Polignac number, because 1295721 - 2² = 1295717 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1295711) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8175 + ... + 8331.

It is an arithmetic number, because the mean of its divisors is an integer number (90376).

2^1295721 is an apocalyptic number.

It is an amenable number.

1295721 is a deficient number, since it is larger than the sum of its proper divisors (873303).

1295721 is a wasteful number, since it uses less digits than its factorization.

1295721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 301 (or 298 counting only the distinct ones).

The product of its digits is 1260, while the sum is 27.

The square root of 1295721 is about 1138.2974128056. The cubic root of 1295721 is about 109.0194112948.

It can be divided in two parts, 1295 and 721, that added together give a triangular number (2016 = T₆₃).

The spelling of 1295721 in words is "one million, two hundred ninety-five thousand, seven hundred twenty-one".