142406642 has 12 divisors (see below), whose sum is σ = 248485230. Its totient is φ = 61031376.

The previous prime is 142406633. The next prime is 142406683. The reversal of 142406642 is 246604241.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 111281401 + 31125241 = 10549^2 + 5579^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 726467 + ... + 726662.

Almost surely, 2^142406642 is an apocalyptic number.

142406642 is a deficient number, since it is larger than the sum of its proper divisors (106078588).

142406642 is a wasteful number, since it uses less digits than its factorization.

142406642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1453145 (or 1453138 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 29.

The square root of 142406642 is about 11933.4254093282. The cubic root of 142406642 is about 522.2078731500.

The spelling of 142406642 in words is "one hundred forty-two million, four hundred six thousand, six hundred forty-two".