145442091 has 8 divisors (see below), whose sum is σ = 195922384. Its totient is φ = 95961600.

The previous prime is 145442069. The next prime is 145442147. The reversal of 145442091 is 190244541.

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

It is not a de Polignac number, because 145442091 - 2⁶ = 145442027 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (145442491) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 249610 + ... + 250191.

It is an arithmetic number, because the mean of its divisors is an integer number (24490298).

Almost surely, 2^145442091 is an apocalyptic number.

145442091 is a deficient number, since it is larger than the sum of its proper divisors (50480293).

145442091 is an equidigital number, since it uses as much as digits as its factorization.

145442091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 499901.

The product of its (nonzero) digits is 5760, while the sum is 30.

The square root of 145442091 is about 12059.9374376487. The cubic root of 145442091 is about 525.8921682796.

The spelling of 145442091 in words is "one hundred forty-five million, four hundred forty-two thousand, ninety-one".