142121413 has 6 divisors (see below), whose sum is σ = 165324966. Its totient is φ = 121818312.

The previous prime is 142121389. The next prime is 142121417. The reversal of 142121413 is 314121241.

It can be written as a sum of positive squares in only one way, i.e., 76073284 + 66048129 = 8722^2 + 8127^2 .

It is a de Polignac number, because none of the positive numbers 2^k-142121413 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (142121417) 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, 1450170 + ... + 1450267.

It is an arithmetic number, because the mean of its divisors is an integer number (27554161).

Almost surely, 2^142121413 is an apocalyptic number.

It is an amenable number.

142121413 is a deficient number, since it is larger than the sum of its proper divisors (23203553).

142121413 is an equidigital number, since it uses as much as digits as its factorization.

142121413 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2900451 (or 2900444 counting only the distinct ones).

The product of its digits is 192, while the sum is 19.

The square root of 142121413 is about 11921.4685756412. The cubic root of 142121413 is about 521.8589933920.

Adding to 142121413 its reverse (314121241), we get a palindrome (456242654).

It can be divided in two parts, 14212 and 1413, that added together give a 6-th power (15625 = 5⁶).

The spelling of 142121413 in words is "one hundred forty-two million, one hundred twenty-one thousand, four hundred thirteen".