1223081842 has 16 divisors (see below), whose sum is σ = 1915102872. Its totient is φ = 585256320.

The previous prime is 1223081819. The next prime is 1223081857. The reversal of 1223081842 is 2481803221.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 588596121 + 634485721 = 24261^2 + 25189^2 .

It is a super-2 number, since 2×1223081842² = 2991858384460225928, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 130963 + ... + 139990.

Almost surely, 2^1223081842 is an apocalyptic number.

1223081842 is a deficient number, since it is larger than the sum of its proper divisors (692021030).

1223081842 is a wasteful number, since it uses less digits than its factorization.

1223081842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 271053.

The product of its (nonzero) digits is 6144, while the sum is 31.

The square root of 1223081842 is about 34972.5870075406. The cubic root of 1223081842 is about 1069.4287112517.

The spelling of 1223081842 in words is "one billion, two hundred twenty-three million, eighty-one thousand, eight hundred forty-two".