145791261 has 48 divisors (see below), whose sum is σ = 265973760. Its totient is φ = 74748960.

The previous prime is 145791257. The next prime is 145791271. The reversal of 145791261 is 162197541.

145791261 is a `hidden beast` number, since 14 + 579 + 12 + 61 = 666.

It is not a de Polignac number, because 145791261 - 2² = 145791257 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145791271) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 53416 + ... + 56078.

It is an arithmetic number, because the mean of its divisors is an integer number (5541120).

Almost surely, 2^145791261 is an apocalyptic number.

145791261 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

145791261 is a deficient number, since it is larger than the sum of its proper divisors (120182499).

145791261 is a wasteful number, since it uses less digits than its factorization.

145791261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2766 (or 2763 counting only the distinct ones).

The product of its digits is 15120, while the sum is 36.

The square root of 145791261 is about 12074.4052027419. The cubic root of 145791261 is about 526.3126770341.

The spelling of 145791261 in words is "one hundred forty-five million, seven hundred ninety-one thousand, two hundred sixty-one".