144942491 has 4 divisors (see below), whose sum is σ = 145144800. Its totient is φ = 144740184.

The previous prime is 144942487. The next prime is 144942509. The reversal of 144942491 is 194249441.

144942491 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.

It is a cyclic number.

It is not a de Polignac number, because 144942491 - 2² = 144942487 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (144942191) 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, 100076 + ... + 101513.

It is an arithmetic number, because the mean of its divisors is an integer number (36286200).

Almost surely, 2^144942491 is an apocalyptic number.

144942491 is a deficient number, since it is larger than the sum of its proper divisors (202309).

144942491 is an equidigital number, since it uses as much as digits as its factorization.

144942491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 202308.

The product of its digits is 41472, while the sum is 38.

The square root of 144942491 is about 12039.2064107233. The cubic root of 144942491 is about 525.2893232179.

The spelling of 144942491 in words is "one hundred forty-four million, nine hundred forty-two thousand, four hundred ninety-one".