1053661 has 4 divisors (see below), whose sum is σ = 1204192. Its totient is φ = 903132.

The previous prime is 1053617. The next prime is 1053691. The reversal of 1053661 is 1663501.

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.

It is a cyclic number.

It is not a de Polignac number, because 1053661 - 2¹³ = 1045469 is a prime.

It is a super-2 number, since 2×1053661² = 2220403005842, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1053691) 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, 75255 + ... + 75268.

It is an arithmetic number, because the mean of its divisors is an integer number (301048).

2^1053661 is an apocalyptic number.

It is an amenable number.

1053661 is a deficient number, since it is larger than the sum of its proper divisors (150531).

1053661 is an equidigital number, since it uses as much as digits as its factorization.

1053661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 150530.

The product of its (nonzero) digits is 540, while the sum is 22.

The square root of 1053661 is about 1026.4799072559. The cubic root of 1053661 is about 101.7576264992.

The spelling of 1053661 in words is "one million, fifty-three thousand, six hundred sixty-one".