146394981 has 12 divisors (see below), whose sum is σ = 222589120. Its totient is φ = 92459880.

The previous prime is 146394961. The next prime is 146394991. The reversal of 146394981 is 189493641.

146394981 is a `hidden beast` number, since 1 + 4 + 639 + 4 + 9 + 8 + 1 = 666.

It is not a de Polignac number, because 146394981 - 2⁵ = 146394949 is a prime.

It is a super-2 number, since 2×146394981² = 42862980923980722, 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 (146394901) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 427885 + ... + 428226.

Almost surely, 2^146394981 is an apocalyptic number.

It is an amenable number.

146394981 is a deficient number, since it is larger than the sum of its proper divisors (76194139).

146394981 is a wasteful number, since it uses less digits than its factorization.

146394981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 856136 (or 856133 counting only the distinct ones).

The product of its digits is 186624, while the sum is 45.

The square root of 146394981 is about 12099.3793642484. The cubic root of 146394981 is about 527.0381615382.

The spelling of 146394981 in words is "one hundred forty-six million, three hundred ninety-four thousand, nine hundred eighty-one".