142630621 has 6 divisors (see below), whose sum is σ = 165917310. Its totient is φ = 122254776.

The previous prime is 142630619. The next prime is 142630639. The reversal of 142630621 is 126036241.

It can be written as a sum of positive squares in only one way, i.e., 118483225 + 24147396 = 10885^2 + 4914^2 .

It is not a de Polignac number, because 142630621 - 2¹ = 142630619 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (142630651) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1455366 + ... + 1455463.

It is an arithmetic number, because the mean of its divisors is an integer number (27652885).

Almost surely, 2^142630621 is an apocalyptic number.

It is an amenable number.

142630621 is a deficient number, since it is larger than the sum of its proper divisors (23286689).

142630621 is an equidigital number, since it uses as much as digits as its factorization.

142630621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2910843 (or 2910836 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 25.

The square root of 142630621 is about 11942.8062447651. The cubic root of 142630621 is about 522.4815081633.

Adding to 142630621 its reverse (126036241), we get a palindrome (268666862).

The spelling of 142630621 in words is "one hundred forty-two million, six hundred thirty thousand, six hundred twenty-one".