154740442 has 4 divisors (see below), whose sum is σ = 232110666. Its totient is φ = 77370220.

The previous prime is 154740431. The next prime is 154740457. The reversal of 154740442 is 244047451.

154740442 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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., 154529761 + 210681 = 12431^2 + 459^2 .

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, 38685109 + ... + 38685112.

Almost surely, 2^154740442 is an apocalyptic number.

154740442 is a deficient number, since it is larger than the sum of its proper divisors (77370224).

154740442 is an equidigital number, since it uses as much as digits as its factorization.

154740442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77370223.

The product of its (nonzero) digits is 17920, while the sum is 31.

The square root of 154740442 is about 12439.4711302370. The cubic root of 154740442 is about 536.8685262697.

Adding to 154740442 its reverse (244047451), we get a palindrome (398787893).

The spelling of 154740442 in words is "one hundred fifty-four million, seven hundred forty thousand, four hundred forty-two".