142640622 has 16 divisors (see below), whose sum is σ = 316979280. Its totient is φ = 47546856.

The previous prime is 142640621. The next prime is 142640627. The reversal of 142640622 is 226046241.

142640622 is a `hidden beast` number, since 14 + 2 + 640 + 6 + 2 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (142640621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1320693 + ... + 1320800.

It is an arithmetic number, because the mean of its divisors is an integer number (19811205).

Almost surely, 2^142640622 is an apocalyptic number.

142640622 is an abundant number, since it is smaller than the sum of its proper divisors (174338658).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

142640622 is a wasteful number, since it uses less digits than its factorization.

142640622 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2641504 (or 2641498 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 27.

The square root of 142640622 is about 11943.2249413632. The cubic root of 142640622 is about 522.4937196959.

Adding to 142640622 its reverse (226046241), we get a palindrome (368686863).

The spelling of 142640622 in words is "one hundred forty-two million, six hundred forty thousand, six hundred twenty-two".