1615441 has 9 divisors (see below), whose sum is σ = 1710939. Its totient is φ = 1525200.

The previous prime is 1615433. The next prime is 1615447. The reversal of 1615441 is 1445161.

The square root of 1615441 is 1271.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 77841 + 1537600 = 279^2 + 1240^2 .

It is not a de Polignac number, because 1615441 - 2³ = 1615433 is a prime.

It is a super-3 number, since 3×1615441³ = 12647204997063633363, which contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1615447) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 39381 + ... + 39421.

2^1615441 is an apocalyptic number.

1615441 is the 1271-st square number.

1615441 is the 636-th centered octagonal number.

It is an amenable number.

1615441 is a deficient number, since it is larger than the sum of its proper divisors (95498).

1615441 is an frugal number, since it uses more digits than its factorization.

1615441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 144 (or 72 counting only the distinct ones).

The product of its digits is 480, while the sum is 22.

The cubic root of 1615441 is about 117.3357536160.

The spelling of 1615441 in words is "one million, six hundred fifteen thousand, four hundred forty-one".