145656261 has 24 divisors (see below), whose sum is σ = 222971840. Its totient is φ = 91368000.

The previous prime is 145656257. The next prime is 145656281. The reversal of 145656261 is 162656541.

It is not a de Polignac number, because 145656261 - 2² = 145656257 is a prime.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145656281) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 23001 + ... + 28641.

Almost surely, 2^145656261 is an apocalyptic number.

It is an amenable number.

145656261 is a deficient number, since it is larger than the sum of its proper divisors (77315579).

145656261 is a wasteful number, since it uses less digits than its factorization.

145656261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5817 (or 5814 counting only the distinct ones).

The product of its digits is 43200, while the sum is 36.

The square root of 145656261 is about 12068.8135705213. The cubic root of 145656261 is about 526.1501749444.

The spelling of 145656261 in words is "one hundred forty-five million, six hundred fifty-six thousand, two hundred sixty-one".