154942 has 4 divisors (see below), whose sum is σ = 232416. Its totient is φ = 77470.

The previous prime is 154937. The next prime is 154943. The reversal of 154942 is 249451.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (154943) by changing a digit.

154942 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38734 + ... + 38737.

It is an arithmetic number, because the mean of its divisors is an integer number (58104).

2¹⁵⁴⁹⁴² is an apocalyptic number.

154942 is a deficient number, since it is larger than the sum of its proper divisors (77474).

154942 is an equidigital number, since it uses as much as digits as its factorization.

154942 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77473.

The product of its digits is 1440, while the sum is 25.

The square root of 154942 is about 393.6267267349. The cubic root of 154942 is about 53.7101525469.

The spelling of 154942 in words is "one hundred fifty-four thousand, nine hundred forty-two".