142640536 has 8 divisors (see below), whose sum is σ = 267451020. Its totient is φ = 71320264.

The previous prime is 142640501. The next prime is 142640551. The reversal of 142640536 is 635046241.

It is a tau number, because it is divible by the number of its divisors (8).

It is a junction number, because it is equal to n+sod(n) for n = 142640498 and 142640507.

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, 8915026 + ... + 8915041.

Almost surely, 2^142640536 is an apocalyptic number.

It is an amenable number.

142640536 is a deficient number, since it is larger than the sum of its proper divisors (124810484).

142640536 is a wasteful number, since it uses less digits than its factorization.

142640536 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17830073 (or 17830069 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 31.

The square root of 142640536 is about 11943.2213409951. The cubic root of 142640536 is about 522.4936146896.

Adding to 142640536 its reverse (635046241), we get a palindrome (777686777).

The spelling of 142640536 in words is "one hundred forty-two million, six hundred forty thousand, five hundred thirty-six".