142661542 has 4 divisors (see below), whose sum is σ = 213992316. Its totient is φ = 71330770.

The previous prime is 142661537. The next prime is 142661551. The reversal of 142661542 is 245166241.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 245166241 = 47 ⋅5216303.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35665384 + ... + 35665387.

It is an arithmetic number, because the mean of its divisors is an integer number (53498079).

Almost surely, 2^142661542 is an apocalyptic number.

142661542 is a deficient number, since it is larger than the sum of its proper divisors (71330774).

142661542 is an equidigital number, since it uses as much as digits as its factorization.

142661542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71330773.

The product of its digits is 11520, while the sum is 31.

The square root of 142661542 is about 11944.1007196021. The cubic root of 142661542 is about 522.5192618221.

The spelling of 142661542 in words is "one hundred forty-two million, six hundred sixty-one thousand, five hundred forty-two".