145685291 has 8 divisors (see below), whose sum is σ = 154392480. Its totient is φ = 136993408.

The previous prime is 145685279. The next prime is 145685321. The reversal of 145685291 is 192586541.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 145685291 - 2⁶ = 145685227 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (145685251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20105 + ... + 26373.

It is an arithmetic number, because the mean of its divisors is an integer number (19299060).

Almost surely, 2^145685291 is an apocalyptic number.

145685291 is a deficient number, since it is larger than the sum of its proper divisors (8707189).

145685291 is a wasteful number, since it uses less digits than its factorization.

145685291 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7653.

The product of its digits is 86400, while the sum is 41.

The square root of 145685291 is about 12070.0161971722. The cubic root of 145685291 is about 526.1851273839.

The spelling of 145685291 in words is "one hundred forty-five million, six hundred eighty-five thousand, two hundred ninety-one".