155742 has 16 divisors (see below), whose sum is σ = 315792. Its totient is φ = 51200.

The previous prime is 155741. The next prime is 155747. The reversal of 155742 is 247551.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 155742.

It is not an unprimeable number, because it can be changed into a prime (155741) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 478 + ... + 734.

It is an arithmetic number, because the mean of its divisors is an integer number (19737).

2¹⁵⁵⁷⁴² is an apocalyptic number.

155742 is an abundant number, since it is smaller than the sum of its proper divisors (160050).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

155742 is a wasteful number, since it uses less digits than its factorization.

155742 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 363.

The product of its digits is 1400, while the sum is 24.

The square root of 155742 is about 394.6416095649. The cubic root of 155742 is about 53.8024330607.

Subtracting 155742 from its reverse (247551), we obtain a square (91809 = 303²).

It can be divided in two parts, 15574 and 2, that added together give a triangular number (15576 = T₁₇₆).

The spelling of 155742 in words is "one hundred fifty-five thousand, seven hundred forty-two".