70542 has 12 divisors (see below), whose sum is σ = 152880. Its totient is φ = 23508.

The previous prime is 70537. The next prime is 70549. The reversal of 70542 is 24507.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (18), and also a Moran number because the ratio is a prime number: 3919 = 70542 / (7 + 0 + 5 + 4 + 2).

It is a plaindrome in base 11 and base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (70549) by changing a digit.

70542 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1942 + ... + 1977.

It is an arithmetic number, because the mean of its divisors is an integer number (12740).

2⁷⁰⁵⁴² is an apocalyptic number.

70542 is an abundant number, since it is smaller than the sum of its proper divisors (82338).

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

70542 is a wasteful number, since it uses less digits than its factorization.

70542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3927 (or 3924 counting only the distinct ones).

The product of its (nonzero) digits is 280, while the sum is 18.

The square root of 70542 is about 265.5974397467. The cubic root of 70542 is about 41.3189480522.

It can be divided in two parts, 7054 and 2, that added together give a square (7056 = 84²).

The spelling of 70542 in words is "seventy thousand, five hundred forty-two".