142021413 has 6 divisors (see below), whose sum is σ = 205142054. Its totient is φ = 94680936.

The previous prime is 142021393. The next prime is 142021463. The reversal of 142021413 is 314120241.

It can be written as a sum of positive squares in only one way, i.e., 122810724 + 19210689 = 11082^2 + 4383^2 .

It is not a de Polignac number, because 142021413 - 2²⁶ = 74912549 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (142021463) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 7890070 + ... + 7890087.

Almost surely, 2^142021413 is an apocalyptic number.

It is an amenable number.

142021413 is a deficient number, since it is larger than the sum of its proper divisors (63120641).

142021413 is a wasteful number, since it uses less digits than its factorization.

142021413 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15780163 (or 15780160 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 142021413 is about 11917.2737234654. The cubic root of 142021413 is about 521.7365672148.

Adding to 142021413 its reverse (314120241), we get a palindrome (456141654).

The spelling of 142021413 in words is "one hundred forty-two million, twenty-one thousand, four hundred thirteen".