154842074 has 4 divisors (see below), whose sum is σ = 232263114. Its totient is φ = 77421036.

The previous prime is 154842073. The next prime is 154842113. The reversal of 154842074 is 470248451.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 470248451 = 61 ⋅7708991.

It can be written as a sum of positive squares in only one way, i.e., 115240225 + 39601849 = 10735^2 + 6293^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (154842073) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38710517 + ... + 38710520.

Almost surely, 2^154842074 is an apocalyptic number.

154842074 is a deficient number, since it is larger than the sum of its proper divisors (77421040).

154842074 is an equidigital number, since it uses as much as digits as its factorization.

154842074 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77421039.

The product of its (nonzero) digits is 35840, while the sum is 35.

The square root of 154842074 is about 12443.5555208309. Note that the first 4 decimals coincide. The cubic root of 154842074 is about 536.9860372022.

The spelling of 154842074 in words is "one hundred fifty-four million, eight hundred forty-two thousand, seventy-four".