9142981 has 2 divisors, whose sum is σ = 9142982. Its totient is φ = 9142980.

The previous prime is 9142963. The next prime is 9142993. The reversal of 9142981 is 1892419.

9142981 is nontrivially palindromic in base 3.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5022081 + 4120900 = 2241^2 + 2030^2 .

It is a cyclic number.

It is not a de Polignac number, because 9142981 - 2⁵ = 9142949 is a prime.

It is a super-2 number, since 2×9142981² = 167188203132722, which contains 22 as substring.

9142981 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9142901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4571490 + 4571491.

It is an arithmetic number, because the mean of its divisors is an integer number (4571491).

Almost surely, 2^9142981 is an apocalyptic number.

It is an amenable number.

9142981 is a deficient number, since it is larger than the sum of its proper divisors (1).

9142981 is an equidigital number, since it uses as much as digits as its factorization.

9142981 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5184, while the sum is 34.

The square root of 9142981 is about 3023.7362649543. The cubic root of 9142981 is about 209.1041276572.

The spelling of 9142981 in words is "nine million, one hundred forty-two thousand, nine hundred eighty-one".