142960721 has 2 divisors, whose sum is σ = 142960722. Its totient is φ = 142960720.

The previous prime is 142960703. The next prime is 142960723. The reversal of 142960721 is 127069241.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 121440400 + 21520321 = 11020^2 + 4639^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-142960721 is a prime.

Together with 142960723, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (142960723) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71480360 + 71480361.

It is an arithmetic number, because the mean of its divisors is an integer number (71480361).

Almost surely, 2^142960721 is an apocalyptic number.

It is an amenable number.

142960721 is a deficient number, since it is larger than the sum of its proper divisors (1).

142960721 is an equidigital number, since it uses as much as digits as its factorization.

142960721 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 142960721 is about 11956.6182928117. The cubic root of 142960721 is about 522.8842694157.

The spelling of 142960721 in words is "one hundred forty-two million, nine hundred sixty thousand, seven hundred twenty-one".