145658961 has 24 divisors (see below), whose sum is σ = 240915584. Its totient is φ = 83073600.

The previous prime is 145658957. The next prime is 145659001. The reversal of 145658961 is 169856541.

145658961 is a `hidden beast` number, since 1 + 4 + 5 + 6 + 589 + 61 = 666.

It is not a de Polignac number, because 145658961 - 2² = 145658957 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is not an unprimeable number, because it can be changed into a prime (145658951) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 35940 + ... + 39786.

Almost surely, 2^145658961 is an apocalyptic number.

It is an amenable number.

145658961 is a deficient number, since it is larger than the sum of its proper divisors (95256623).

145658961 is a wasteful number, since it uses less digits than its factorization.

145658961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4461 (or 4458 counting only the distinct ones).

The product of its digits is 259200, while the sum is 45.

The square root of 145658961 is about 12068.9254285541. The cubic root of 145658961 is about 526.1534259700.

The spelling of 145658961 in words is "one hundred forty-five million, six hundred fifty-eight thousand, nine hundred sixty-one".