7142621 has 2 divisors, whose sum is σ = 7142622. Its totient is φ = 7142620.

The previous prime is 7142609. The next prime is 7142623. The reversal of 7142621 is 1262417.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5736025 + 1406596 = 2395^2 + 1186^2 .

It is a cyclic number.

It is not a de Polignac number, because 7142621 - 2⁶ = 7142557 is a prime.

Together with 7142623, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7142623) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3571310 + 3571311.

It is an arithmetic number, because the mean of its divisors is an integer number (3571311).

Almost surely, 2^7142621 is an apocalyptic number.

It is an amenable number.

7142621 is a deficient number, since it is larger than the sum of its proper divisors (1).

7142621 is an equidigital number, since it uses as much as digits as its factorization.

7142621 is an evil number, because the sum of its binary digits is even.

The product of its digits is 672, while the sum is 23.

The square root of 7142621 is about 2672.5682404758. The cubic root of 7142621 is about 192.5835562379.

The spelling of 7142621 in words is "seven million, one hundred forty-two thousand, six hundred twenty-one".