1221415802 has 8 divisors (see below), whose sum is σ = 1838015712. Its totient is φ = 608743900.

The previous prime is 1221415787. The next prime is 1221415849. The reversal of 1221415802 is 2085141221.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×1221415802² = 2983713122750606408, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 981224 + ... + 982467.

It is an arithmetic number, because the mean of its divisors is an integer number (229751964).

Almost surely, 2^1221415802 is an apocalyptic number.

1221415802 is a deficient number, since it is larger than the sum of its proper divisors (616599910).

1221415802 is a wasteful number, since it uses less digits than its factorization.

1221415802 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1964004.

The product of its (nonzero) digits is 1280, while the sum is 26.

The square root of 1221415802 is about 34948.7596632556. The cubic root of 1221415802 is about 1068.9429109406.

The spelling of 1221415802 in words is "one billion, two hundred twenty-one million, four hundred fifteen thousand, eight hundred two".