1078421 has 8 divisors (see below), whose sum is σ = 1144800. Its totient is φ = 1013040.

The previous prime is 1078417. The next prime is 1078471. The reversal of 1078421 is 1248701.

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 1078421 - 2² = 1078417 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1078411) 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, 3875 + ... + 4143.

It is an arithmetic number, because the mean of its divisors is an integer number (143100).

2^1078421 is an apocalyptic number.

It is an amenable number.

1078421 is a deficient number, since it is larger than the sum of its proper divisors (66379).

1078421 is a wasteful number, since it uses less digits than its factorization.

1078421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 499.

The product of its (nonzero) digits is 448, while the sum is 23.

The square root of 1078421 is about 1038.4705099328. The cubic root of 1078421 is about 102.5485314497.

The spelling of 1078421 in words is "one million, seventy-eight thousand, four hundred twenty-one".