145880971 has 4 divisors (see below), whose sum is σ = 145917000. Its totient is φ = 145844944.

The previous prime is 145880941. The next prime is 145880989. The reversal of 145880971 is 179088541.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 145880971 - 2⁷ = 145880843 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (145880921) 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, 11041 + ... + 20338.

It is an arithmetic number, because the mean of its divisors is an integer number (36479250).

Almost surely, 2^145880971 is an apocalyptic number.

145880971 is a deficient number, since it is larger than the sum of its proper divisors (36029).

145880971 is an equidigital number, since it uses as much as digits as its factorization.

145880971 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36028.

The product of its (nonzero) digits is 80640, while the sum is 43.

The square root of 145880971 is about 12078.1195142290. The cubic root of 145880971 is about 526.4206072096.

The spelling of 145880971 in words is "one hundred forty-five million, eight hundred eighty thousand, nine hundred seventy-one".