145622591 has 12 divisors (see below), whose sum is σ = 155494752. Its totient is φ = 136304256.

The previous prime is 145622579. The next prime is 145622599. The reversal of 145622591 is 195226541.

It is a happy number.

145622591 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 145622591 - 2²⁶ = 78513727 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 (145622599) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 21935 + ... + 27791.

It is an arithmetic number, because the mean of its divisors is an integer number (12957896).

Almost surely, 2^145622591 is an apocalyptic number.

145622591 is a deficient number, since it is larger than the sum of its proper divisors (9872161).

145622591 is an equidigital number, since it uses as much as digits as its factorization.

145622591 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5950 (or 5927 counting only the distinct ones).

The product of its digits is 21600, while the sum is 35.

The square root of 145622591 is about 12067.4185723377. The cubic root of 145622591 is about 526.1096300764.

The spelling of 145622591 in words is "one hundred forty-five million, six hundred twenty-two thousand, five hundred ninety-one".