43972154 has 4 divisors (see below), whose sum is σ = 65958234. Its totient is φ = 21986076.

The previous prime is 43972153. The next prime is 43972157. The reversal of 43972154 is 45127934.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 45127934 = 2 ⋅22563967.

It can be written as a sum of positive squares in only one way, i.e., 39250225 + 4721929 = 6265^2 + 2173^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (43972153) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10993037 + ... + 10993040.

Almost surely, 2^43972154 is an apocalyptic number.

43972154 is a deficient number, since it is larger than the sum of its proper divisors (21986080).

43972154 is a wasteful number, since it uses less digits than its factorization.

43972154 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21986079.

The product of its digits is 30240, while the sum is 35.

The square root of 43972154 is about 6631.1502772898. The cubic root of 43972154 is about 352.9603435136.

The spelling of 43972154 in words is "forty-three million, nine hundred seventy-two thousand, one hundred fifty-four".