155742254 has 8 divisors (see below), whose sum is σ = 234090648. Its totient is φ = 77712040.

The previous prime is 155742247. The next prime is 155742271. The reversal of 155742254 is 452247551.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable 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 in 3 ways as a sum of consecutive naturals, for example, 78317 + ... + 80280.

It is an arithmetic number, because the mean of its divisors is an integer number (29261331).

Almost surely, 2^155742254 is an apocalyptic number.

155742254 is a deficient number, since it is larger than the sum of its proper divisors (78348394).

155742254 is a wasteful number, since it uses less digits than its factorization.

155742254 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 159090.

The product of its digits is 56000, while the sum is 35.

The square root of 155742254 is about 12479.6736335531. The cubic root of 155742254 is about 538.0246230951.

The spelling of 155742254 in words is "one hundred fifty-five million, seven hundred forty-two thousand, two hundred fifty-four".