145974189 has 24 divisors (see below), whose sum is σ = 208927008. Its totient is φ = 90630400.

The previous prime is 145974167. The next prime is 145974203. The reversal of 145974189 is 981479541.

It is not a de Polignac number, because 145974189 - 2¹² = 145970093 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145974149) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 86734 + ... + 88400.

It is an arithmetic number, because the mean of its divisors is an integer number (8705292).

Almost surely, 2^145974189 is an apocalyptic number.

It is an amenable number.

145974189 is a deficient number, since it is larger than the sum of its proper divisors (62952819).

145974189 is a wasteful number, since it uses less digits than its factorization.

145974189 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1805 (or 1788 counting only the distinct ones).

The product of its digits is 362880, while the sum is 48.

The square root of 145974189 is about 12081.9778596056. The cubic root of 145974189 is about 526.5327109958.

The spelling of 145974189 in words is "one hundred forty-five million, nine hundred seventy-four thousand, one hundred eighty-nine".