1052581 has 4 divisors (see below), whose sum is σ = 1108000. Its totient is φ = 997164.

The previous prime is 1052573. The next prime is 1052609. The reversal of 1052581 is 1852501.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1852501 = 7 ⋅264643.

It is a cyclic number.

It is not a de Polignac number, because 1052581 - 2³ = 1052573 is a prime.

It is a super-2 number, since 2×1052581² = 2215853523122, which contains 22 as substring.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1052531) 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, 27681 + ... + 27718.

It is an arithmetic number, because the mean of its divisors is an integer number (277000).

2^1052581 is an apocalyptic number.

It is an amenable number.

1052581 is a deficient number, since it is larger than the sum of its proper divisors (55419).

1052581 is an equidigital number, since it uses as much as digits as its factorization.

1052581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55418.

The product of its (nonzero) digits is 400, while the sum is 22.

The square root of 1052581 is about 1025.9537026591. The cubic root of 1052581 is about 101.7228475060.

The spelling of 1052581 in words is "one million, fifty-two thousand, five hundred eighty-one".