142212461 has 2 divisors, whose sum is σ = 142212462. Its totient is φ = 142212460.

The previous prime is 142212443. The next prime is 142212467. The reversal of 142212461 is 164212241.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 141015625 + 1196836 = 11875^2 + 1094^2 .

It is an emirp because it is prime and its reverse (164212241) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 142212461 - 2¹⁸ = 141950317 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (142212467) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71106230 + 71106231.

It is an arithmetic number, because the mean of its divisors is an integer number (71106231).

Almost surely, 2^142212461 is an apocalyptic number.

It is an amenable number.

142212461 is a deficient number, since it is larger than the sum of its proper divisors (1).

142212461 is an equidigital number, since it uses as much as digits as its factorization.

142212461 is an evil number, because the sum of its binary digits is even.

The product of its digits is 768, while the sum is 23.

The square root of 142212461 is about 11925.2866212934. The cubic root of 142212461 is about 521.9704100411.

The spelling of 142212461 in words is "one hundred forty-two million, two hundred twelve thousand, four hundred sixty-one".