145915049 has 4 divisors (see below), whose sum is σ = 166760064. Its totient is φ = 125070036.

The previous prime is 145915043. The next prime is 145915051. The reversal of 145915049 is 940519541.

145915049 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 Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 145915049 - 2⁸ = 145914793 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (145915043) 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, 10422497 + ... + 10422510.

It is an arithmetic number, because the mean of its divisors is an integer number (41690016).

Almost surely, 2^145915049 is an apocalyptic number.

It is an amenable number.

145915049 is a deficient number, since it is larger than the sum of its proper divisors (20845015).

145915049 is an equidigital number, since it uses as much as digits as its factorization.

145915049 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20845014.

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

The square root of 145915049 is about 12079.5301647043. The cubic root of 145915049 is about 526.4615948829.

The spelling of 145915049 in words is "one hundred forty-five million, nine hundred fifteen thousand, forty-nine".