145253961 has 6 divisors (see below), whose sum is σ = 209811290. Its totient is φ = 96835968.

The previous prime is 145253893. The next prime is 145253989. The reversal of 145253961 is 169352541.

145253961 is a `hidden beast` number, since 14 + 52 + 539 + 61 = 666.

It can be written as a sum of positive squares in only one way, i.e., 107246736 + 38007225 = 10356^2 + 6165^2 .

It is not a de Polignac number, because 145253961 - 2¹⁰ = 145252937 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (145253161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 8069656 + ... + 8069673.

Almost surely, 2^145253961 is an apocalyptic number.

It is an amenable number.

145253961 is a deficient number, since it is larger than the sum of its proper divisors (64557329).

145253961 is a wasteful number, since it uses less digits than its factorization.

145253961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16139335 (or 16139332 counting only the distinct ones).

The product of its digits is 32400, while the sum is 36.

The square root of 145253961 is about 12052.1351220437. The cubic root of 145253961 is about 525.6653224797.

The spelling of 145253961 in words is "one hundred forty-five million, two hundred fifty-three thousand, nine hundred sixty-one".