976421 has 4 divisors (see below), whose sum is σ = 978732. Its totient is φ = 974112.

The previous prime is 976411. The next prime is 976439. The reversal of 976421 is 124679.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 52900 + 923521 = 230^2 + 961^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-976421 is a prime.

It is a Duffinian number.

It is a plaindrome in base 15.

It is a nialpdrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (976411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 320 + ... + 1433.

It is an arithmetic number, because the mean of its divisors is an integer number (244683).

2⁹⁷⁶⁴²¹ is an apocalyptic number.

It is an amenable number.

976421 is a deficient number, since it is larger than the sum of its proper divisors (2311).

976421 is a wasteful number, since it uses less digits than its factorization.

976421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2310.

The product of its digits is 3024, while the sum is 29.

The square root of 976421 is about 988.1401722428. The cubic root of 976421 is about 99.2077736819.

The spelling of 976421 in words is "nine hundred seventy-six thousand, four hundred twenty-one".