145891972 has 12 divisors (see below), whose sum is σ = 257002816. Its totient is φ = 72462600.

The previous prime is 145891969. The next prime is 145892003. The reversal of 145891972 is 279198541.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 120168 + ... + 121375.

Almost surely, 2^145891972 is an apocalyptic number.

It is an amenable number.

145891972 is a deficient number, since it is larger than the sum of its proper divisors (111110844).

145891972 is a wasteful number, since it uses less digits than its factorization.

145891972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 241698 (or 241696 counting only the distinct ones).

The product of its digits is 181440, while the sum is 46.

The square root of 145891972 is about 12078.5749159410. The cubic root of 145891972 is about 526.4338394758.

It can be divided in two parts, 14589 and 1972, that added together give a palindrome (16561).

The spelling of 145891972 in words is "one hundred forty-five million, eight hundred ninety-one thousand, nine hundred seventy-two".