145922591 has 4 divisors (see below), whose sum is σ = 145946784. Its totient is φ = 145898400.

The previous prime is 145922587. The next prime is 145922599. The reversal of 145922591 is 195229541.

145922591 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 145922591 - 2² = 145922587 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145922599) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5111 + ... + 17831.

It is an arithmetic number, because the mean of its divisors is an integer number (36486696).

Almost surely, 2^145922591 is an apocalyptic number.

145922591 is a deficient number, since it is larger than the sum of its proper divisors (24193).

145922591 is a wasteful number, since it uses less digits than its factorization.

145922591 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24192.

The product of its digits is 32400, while the sum is 38.

The square root of 145922591 is about 12079.8423416864. The cubic root of 145922591 is about 526.4706652403.

The spelling of 145922591 in words is "one hundred forty-five million, nine hundred twenty-two thousand, five hundred ninety-one".