142621361 has 2 divisors, whose sum is σ = 142621362. Its totient is φ = 142621360.

The previous prime is 142621309. The next prime is 142621363. The reversal of 142621361 is 163126241.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 111429136 + 31192225 = 10556^2 + 5585^2 .

It is an emirp because it is prime and its reverse (163126241) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-142621361 is a prime.

It is a super-2 number, since 2×142621361² = 40681705226984642, which contains 22 as substring.

Together with 142621363, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 142621361.

It is not a weakly prime, because it can be changed into another prime (142621363) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71310680 + 71310681.

It is an arithmetic number, because the mean of its divisors is an integer number (71310681).

Almost surely, 2^142621361 is an apocalyptic number.

It is an amenable number.

142621361 is a deficient number, since it is larger than the sum of its proper divisors (1).

142621361 is an equidigital number, since it uses as much as digits as its factorization.

142621361 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1728, while the sum is 26.

The square root of 142621361 is about 11942.4185573945. The cubic root of 142621361 is about 522.4702009058.

The spelling of 142621361 in words is "one hundred forty-two million, six hundred twenty-one thousand, three hundred sixty-one".