142079621 has 2 divisors, whose sum is σ = 142079622. Its totient is φ = 142079620.

The previous prime is 142079617. The next prime is 142079627. The reversal of 142079621 is 126970241.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 98704225 + 43375396 = 9935^2 + 6586^2 .

It is an emirp because it is prime and its reverse (126970241) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 142079621 - 2² = 142079617 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (142079627) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71039810 + 71039811.

It is an arithmetic number, because the mean of its divisors is an integer number (71039811).

Almost surely, 2^142079621 is an apocalyptic number.

It is an amenable number.

142079621 is a deficient number, since it is larger than the sum of its proper divisors (1).

142079621 is an equidigital number, since it uses as much as digits as its factorization.

142079621 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6048, while the sum is 32.

The square root of 142079621 is about 11919.7156425814. The cubic root of 142079621 is about 521.8078360313.

The spelling of 142079621 in words is "one hundred forty-two million, seventy-nine thousand, six hundred twenty-one".