1372865 has 8 divisors (see below), whose sum is σ = 1774248. Its totient is φ = 1013760.

The previous prime is 1372849. The next prime is 1372867. The reversal of 1372865 is 5682731.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 82369 + 1290496 = 287^2 + 1136^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1372865 - 2⁴ = 1372849 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1372867) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10496 + ... + 10625.

It is an arithmetic number, because the mean of its divisors is an integer number (221781).

2^1372865 is an apocalyptic number.

It is an amenable number.

1372865 is a deficient number, since it is larger than the sum of its proper divisors (401383).

1372865 is a wasteful number, since it uses less digits than its factorization.

1372865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21139.

The product of its digits is 10080, while the sum is 32.

The square root of 1372865 is about 1171.6932192345. The cubic root of 1372865 is about 111.1414208052.

The spelling of 1372865 in words is "one million, three hundred seventy-two thousand, eight hundred sixty-five".