154454242 has 4 divisors (see below), whose sum is σ = 231681366. Its totient is φ = 77227120.

The previous prime is 154454239. The next prime is 154454263. The reversal of 154454242 is 242454451.

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., 97436641 + 57017601 = 9871^2 + 7551^2 .

It is a super-2 number, since 2×154454242² = 47712225743589128, which contains 22 as substring.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38613559 + ... + 38613562.

Almost surely, 2^154454242 is an apocalyptic number.

154454242 is a deficient number, since it is larger than the sum of its proper divisors (77227124).

154454242 is an equidigital number, since it uses as much as digits as its factorization.

154454242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77227123.

The product of its digits is 25600, while the sum is 31.

The square root of 154454242 is about 12427.9621016480. The cubic root of 154454242 is about 536.5373338193.

The spelling of 154454242 in words is "one hundred fifty-four million, four hundred fifty-four thousand, two hundred forty-two".