142444637 has 2 divisors, whose sum is σ = 142444638. Its totient is φ = 142444636.

The previous prime is 142444609. The next prime is 142444651. The reversal of 142444637 is 736444241.

142444637 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 122899396 + 19545241 = 11086^2 + 4421^2 .

It is a cyclic number.

It is not a de Polignac number, because 142444637 - 2¹⁸ = 142182493 is a prime.

It is a super-2 number, since 2×142444637² = 40580949220123538, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 142444597 and 142444606.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (142444657) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71222318 + 71222319.

It is an arithmetic number, because the mean of its divisors is an integer number (71222319).

Almost surely, 2^142444637 is an apocalyptic number.

It is an amenable number.

142444637 is a deficient number, since it is larger than the sum of its proper divisors (1).

142444637 is an equidigital number, since it uses as much as digits as its factorization.

142444637 is an evil number, because the sum of its binary digits is even.

The product of its digits is 64512, while the sum is 35.

The square root of 142444637 is about 11935.0172601467. The cubic root of 142444637 is about 522.2543118168.

Adding to 142444637 its reverse (736444241), we get a palindrome (878888878).

It can be divided in two parts, 14244 and 4637, that added together give a palindrome (18881).

The spelling of 142444637 in words is "one hundred forty-two million, four hundred forty-four thousand, six hundred thirty-seven".