1022256642 has 24 divisors (see below), whose sum is σ = 2247276528. Its totient is φ = 309774520.

The previous prime is 1022256637. The next prime is 1022256661. The reversal of 1022256642 is 2466522201.

It is a happy number.

1022256642 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×1022256642² = 2090017284226232328, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 703308 + ... + 704759.

It is an arithmetic number, because the mean of its divisors is an integer number (93636522).

Almost surely, 2^1022256642 is an apocalyptic number.

1022256642 is an abundant number, since it is smaller than the sum of its proper divisors (1225019886).

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

1022256642 is a wasteful number, since it uses less digits than its factorization.

1022256642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1408094 (or 1408083 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 30.

The square root of 1022256642 is about 31972.7484273717. The cubic root of 1022256642 is about 1007.3645114965.

Adding to 1022256642 its reverse (2466522201), we get a palindrome (3488778843).

The spelling of 1022256642 in words is "one billion, twenty-two million, two hundred fifty-six thousand, six hundred forty-two".