145641974 has 4 divisors (see below), whose sum is σ = 218462964. Its totient is φ = 72820986.

The previous prime is 145641961. The next prime is 145642033. The reversal of 145641974 is 479146541.

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, 36410492 + ... + 36410495.

It is an arithmetic number, because the mean of its divisors is an integer number (54615741).

Almost surely, 2^145641974 is an apocalyptic number.

145641974 is a deficient number, since it is larger than the sum of its proper divisors (72820990).

145641974 is an equidigital number, since it uses as much as digits as its factorization.

145641974 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72820989.

The product of its digits is 120960, while the sum is 41.

The square root of 145641974 is about 12068.2216585543. The cubic root of 145641974 is about 526.1329715339.

The spelling of 145641974 in words is "one hundred forty-five million, six hundred forty-one thousand, nine hundred seventy-four".