10402981 has 2 divisors, whose sum is σ = 10402982. Its totient is φ = 10402980.

The previous prime is 10402961. The next prime is 10403017. The reversal of 10402981 is 18920401.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8468100 + 1934881 = 2910^2 + 1391^2 .

It is a cyclic number.

It is not a de Polignac number, because 10402981 - 2¹⁷ = 10271909 is a prime.

It is a super-2 number, since 2×10402981² = 216444027372722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10402961) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5201490 + 5201491.

It is an arithmetic number, because the mean of its divisors is an integer number (5201491).

Almost surely, 2^10402981 is an apocalyptic number.

It is an amenable number.

10402981 is a deficient number, since it is larger than the sum of its proper divisors (1).

10402981 is an equidigital number, since it uses as much as digits as its factorization.

10402981 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 576, while the sum is 25.

The square root of 10402981 is about 3225.3652506344. The cubic root of 10402981 is about 218.2994300185.

The spelling of 10402981 in words is "ten million, four hundred two thousand, nine hundred eighty-one".