621122642 has 32 divisors (see below), whose sum is σ = 1128816000. Its totient is φ = 250225920.

The previous prime is 621122633. The next prime is 621122683. The reversal of 621122642 is 246221126.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 355892 + ... + 357632.

It is an arithmetic number, because the mean of its divisors is an integer number (35275500).

Almost surely, 2^621122642 is an apocalyptic number.

621122642 is a deficient number, since it is larger than the sum of its proper divisors (507693358).

621122642 is a wasteful number, since it uses less digits than its factorization.

621122642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3266.

The product of its digits is 2304, while the sum is 26.

The square root of 621122642 is about 24922.3321942390. The cubic root of 621122642 is about 853.2162541127.

Adding to 621122642 its reverse (246221126), we get a palindrome (867343768).

The spelling of 621122642 in words is "six hundred twenty-one million, one hundred twenty-two thousand, six hundred forty-two".