155123042 has 8 divisors (see below), whose sum is σ = 232804800. Its totient is φ = 77521444.

The previous prime is 155123021. The next prime is 155123051. The reversal of 155123042 is 240321551.

155123042 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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

It is a super-4 number, since 4×155123042⁴ (a number of 34 digits) contains 4444 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 155122999 and 155123017.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14942 + ... + 23097.

It is an arithmetic number, because the mean of its divisors is an integer number (29100600).

Almost surely, 2^155123042 is an apocalyptic number.

155123042 is a deficient number, since it is larger than the sum of its proper divisors (77681758).

155123042 is a wasteful number, since it uses less digits than its factorization.

155123042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40080.

The product of its (nonzero) digits is 1200, while the sum is 23.

The square root of 155123042 is about 12454.8401033494. The cubic root of 155123042 is about 537.3106361605.

Adding to 155123042 its reverse (240321551), we get a palindrome (395444593).

The spelling of 155123042 in words is "one hundred fifty-five million, one hundred twenty-three thousand, forty-two".