1047021 has 4 divisors (see below), whose sum is σ = 1396032. Its totient is φ = 698012.

The previous prime is 1046999. The next prime is 1047031. The reversal of 1047021 is 1207401.

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 1047021 - 2¹⁰ = 1045997 is a prime.

It is a D-number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1047031) 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, 174501 + ... + 174506.

It is an arithmetic number, because the mean of its divisors is an integer number (349008).

2^1047021 is an apocalyptic number.

It is an amenable number.

1047021 is a deficient number, since it is larger than the sum of its proper divisors (349011).

1047021 is an equidigital number, since it uses as much as digits as its factorization.

1047021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 349010.

The product of its (nonzero) digits is 56, while the sum is 15.

The square root of 1047021 is about 1023.2404409522. The cubic root of 1047021 is about 101.5434225785.

The spelling of 1047021 in words is "one million, forty-seven thousand, twenty-one".