1053721 has 8 divisors (see below), whose sum is σ = 1145600. Its totient is φ = 965520.

The previous prime is 1053713. The next prime is 1053727. The reversal of 1053721 is 1273501.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1053721 - 2³ = 1053713 is a prime.

It is a super-2 number, since 2×1053721² = 2220655891682, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1053727) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 306 + ... + 1483.

It is an arithmetic number, because the mean of its divisors is an integer number (143200).

2^1053721 is an apocalyptic number.

It is an amenable number.

1053721 is a deficient number, since it is larger than the sum of its proper divisors (91879).

1053721 is a wasteful number, since it uses less digits than its factorization.

1053721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1839.

The product of its (nonzero) digits is 210, while the sum is 19.

The square root of 1053721 is about 1026.5091329355. The cubic root of 1053721 is about 101.7595579686.

The spelling of 1053721 in words is "one million, fifty-three thousand, seven hundred twenty-one".