842572154 has 4 divisors (see below), whose sum is σ = 1263858234. Its totient is φ = 421286076.

The previous prime is 842572151. The next prime is 842572201. The reversal of 842572154 is 451275248.

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

It can be written as a sum of positive squares in only one way, i.e., 745017025 + 97555129 = 27295^2 + 9877^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (842572151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210643037 + ... + 210643040.

Almost surely, 2^842572154 is an apocalyptic number.

842572154 is a deficient number, since it is larger than the sum of its proper divisors (421286080).

842572154 is a wasteful number, since it uses less digits than its factorization.

842572154 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 421286079.

The product of its digits is 89600, while the sum is 38.

The square root of 842572154 is about 29027.0934473295. The cubic root of 842572154 is about 944.5008810391.

The spelling of 842572154 in words is "eight hundred forty-two million, five hundred seventy-two thousand, one hundred fifty-four".