1565441 has 2 divisors, whose sum is σ = 1565442. Its totient is φ = 1565440.

The previous prime is 1565437. The next prime is 1565471. The reversal of 1565441 is 1445651.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 817216 + 748225 = 904^2 + 865^2 .

It is a cyclic number.

It is not a de Polignac number, because 1565441 - 2² = 1565437 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1565441.

It is not a weakly prime, because it can be changed into another prime (1565471) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 782720 + 782721.

It is an arithmetic number, because the mean of its divisors is an integer number (782721).

2^1565441 is an apocalyptic number.

It is an amenable number.

1565441 is a deficient number, since it is larger than the sum of its proper divisors (1).

1565441 is an equidigital number, since it uses as much as digits as its factorization.

1565441 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2400, while the sum is 26.

The square root of 1565441 is about 1251.1758469536. The cubic root of 1565441 is about 116.1124800773.

It can be divided in two parts, 15 and 65441, that added together give a palindrome (65456).

The spelling of 1565441 in words is "one million, five hundred sixty-five thousand, four hundred forty-one".