142274521 has 2 divisors, whose sum is σ = 142274522. Its totient is φ = 142274520.

The previous prime is 142274477. The next prime is 142274537. The reversal of 142274521 is 125472241.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 95160025 + 47114496 = 9755^2 + 6864^2 .

It is a cyclic number.

It is not a de Polignac number, because 142274521 - 2⁹ = 142274009 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 142274521.

It is not a weakly prime, because it can be changed into another prime (142244521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71137260 + 71137261.

It is an arithmetic number, because the mean of its divisors is an integer number (71137261).

Almost surely, 2^142274521 is an apocalyptic number.

It is an amenable number.

142274521 is a deficient number, since it is larger than the sum of its proper divisors (1).

142274521 is an equidigital number, since it uses as much as digits as its factorization.

142274521 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4480, while the sum is 28.

The square root of 142274521 is about 11927.8883713757. Note that the first 3 decimals coincide. The cubic root of 142274521 is about 522.0463264376.

The spelling of 142274521 in words is "one hundred forty-two million, two hundred seventy-four thousand, five hundred twenty-one".