8402981 has 8 divisors (see below), whose sum is σ = 9284544. Its totient is φ = 7564480.

The previous prime is 8402971. The next prime is 8403029. The reversal of 8402981 is 1892048.

It is a happy number.

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 8402981 - 2⁶ = 8402917 is a prime.

It is a super-2 number, since 2×8402981² = 141220179372722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8402951) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10355 + ... + 11136.

It is an arithmetic number, because the mean of its divisors is an integer number (1160568).

Almost surely, 2^8402981 is an apocalyptic number.

It is an amenable number.

8402981 is a deficient number, since it is larger than the sum of its proper divisors (881563).

8402981 is a wasteful number, since it uses less digits than its factorization.

8402981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21531.

The product of its (nonzero) digits is 4608, while the sum is 32.

The square root of 8402981 is about 2898.7895749778. The cubic root of 8402981 is about 203.3033151661.

The spelling of 8402981 in words is "eight million, four hundred two thousand, nine hundred eighty-one".