155542 has 8 divisors (see below), whose sum is σ = 236376. Its totient is φ = 76752.

The previous prime is 155539. The next prime is 155557. The reversal of 155542 is 245551.

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, 303 + ... + 634.

It is an arithmetic number, because the mean of its divisors is an integer number (29547).

2¹⁵⁵⁵⁴² is an apocalyptic number.

155542 is a deficient number, since it is larger than the sum of its proper divisors (80834).

155542 is an equidigital number, since it uses as much as digits as its factorization.

155542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1022.

The product of its digits is 1000, while the sum is 22.

The square root of 155542 is about 394.3881336957. The cubic root of 155542 is about 53.7793926134.

Subtracting 155542 from its reverse (245551), we obtain a palindrome (90009).

The spelling of 155542 in words is "one hundred fifty-five thousand, five hundred forty-two".