145549142 has 4 divisors (see below), whose sum is σ = 218323716. Its totient is φ = 72774570.

The previous prime is 145549099. The next prime is 145549153. The reversal of 145549142 is 241945541.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36387284 + ... + 36387287.

It is an arithmetic number, because the mean of its divisors is an integer number (54580929).

Almost surely, 2^145549142 is an apocalyptic number.

145549142 is a deficient number, since it is larger than the sum of its proper divisors (72774574).

145549142 is an equidigital number, since it uses as much as digits as its factorization.

145549142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72774573.

The product of its digits is 28800, while the sum is 35.

The square root of 145549142 is about 12064.3749112832. The cubic root of 145549142 is about 526.0211622901.

The spelling of 145549142 in words is "one hundred forty-five million, five hundred forty-nine thousand, one hundred forty-two".