1382561 has 4 divisors (see below), whose sum is σ = 1416324. Its totient is φ = 1348800.

The previous prime is 1382551. The next prime is 1382567. The reversal of 1382561 is 1652831.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 46225 + 1336336 = 215^2 + 1156^2 .

It is a cyclic number.

It is not a de Polignac number, because 1382561 - 2¹⁰ = 1381537 is a prime.

It is a super-2 number, since 2×1382561² = 3822949837442, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1382561.

It is not an unprimeable number, because it can be changed into a prime (1382567) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16820 + ... + 16901.

It is an arithmetic number, because the mean of its divisors is an integer number (354081).

2^1382561 is an apocalyptic number.

It is an amenable number.

1382561 is a deficient number, since it is larger than the sum of its proper divisors (33763).

1382561 is an equidigital number, since it uses as much as digits as its factorization.

1382561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33762.

The product of its digits is 1440, while the sum is 26.

The square root of 1382561 is about 1175.8235411829. The cubic root of 1382561 is about 111.4024564673.

The spelling of 1382561 in words is "one million, three hundred eighty-two thousand, five hundred sixty-one".