142451239621 has 2 divisors, whose sum is σ = 142451239622. Its totient is φ = 142451239620.

The previous prime is 142451239547. The next prime is 142451239681. The reversal of 142451239621 is 126932154241.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 137333983396 + 5117256225 = 370586^2 + 71535^2 .

It is a cyclic number.

It is not a de Polignac number, because 142451239621 - 2²¹ = 142449142469 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (142451239681) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71225619810 + 71225619811.

It is an arithmetic number, because the mean of its divisors is an integer number (71225619811).

Almost surely, 2^142451239621 is an apocalyptic number.

It is an amenable number.

142451239621 is a deficient number, since it is larger than the sum of its proper divisors (1).

142451239621 is an equidigital number, since it uses as much as digits as its factorization.

142451239621 is an evil number, because the sum of its binary digits is even.

The product of its digits is 103680, while the sum is 40.

The spelling of 142451239621 in words is "one hundred forty-two billion, four hundred fifty-one million, two hundred thirty-nine thousand, six hundred twenty-one".