1072421 has 8 divisors (see below), whose sum is σ = 1279104. Its totient is φ = 879120.

The previous prime is 1072397. The next prime is 1072429. The reversal of 1072421 is 1242701.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1072421 is a prime.

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 1072421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1072429) 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, 3170 + ... + 3491.

It is an arithmetic number, because the mean of its divisors is an integer number (159888).

2^1072421 is an apocalyptic number.

It is an amenable number.

1072421 is a deficient number, since it is larger than the sum of its proper divisors (206683).

1072421 is an equidigital number, since it uses as much as digits as its factorization.

1072421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6691.

The product of its (nonzero) digits is 112, while the sum is 17.

The square root of 1072421 is about 1035.5776165986. The cubic root of 1072421 is about 102.3579949074.

The spelling of 1072421 in words is "one million, seventy-two thousand, four hundred twenty-one".