1221862046 has 32 divisors (see below), whose sum is σ = 2016887040. Its totient is φ = 552577536.

The previous prime is 1221862027. The next prime is 1221862073. The reversal of 1221862046 is 6402681221.

It is a super-2 number, since 2×1221862046² = 2985893718910612232, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 217100 + ... + 222656.

It is an arithmetic number, because the mean of its divisors is an integer number (63027720).

Almost surely, 2^1221862046 is an apocalyptic number.

1221862046 is a deficient number, since it is larger than the sum of its proper divisors (795024994).

1221862046 is a wasteful number, since it uses less digits than its factorization.

1221862046 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5828.

The product of its (nonzero) digits is 9216, while the sum is 32.

The square root of 1221862046 is about 34955.1433411451. The cubic root of 1221862046 is about 1069.0730744442.

The spelling of 1221862046 in words is "one billion, two hundred twenty-one million, eight hundred sixty-two thousand, forty-six".