1221473072 has 10 divisors (see below), whose sum is σ = 2366604108. Its totient is φ = 610736528.

The previous prime is 1221473063. The next prime is 1221473101. The reversal of 1221473072 is 2703741221.

It is a super-2 number, since 2×1221473072² = 2983992931242234368, which contains 22 as substring.

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 as a sum of consecutive naturals, namely, 38171018 + ... + 38171049.

Almost surely, 2^1221473072 is an apocalyptic number.

It is an amenable number.

1221473072 is a deficient number, since it is larger than the sum of its proper divisors (1145131036).

1221473072 is an equidigital number, since it uses as much as digits as its factorization.

1221473072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76342075 (or 76342069 counting only the distinct ones).

The product of its (nonzero) digits is 4704, while the sum is 29.

The square root of 1221473072 is about 34949.5789960337. The cubic root of 1221473072 is about 1068.9596176192.

The spelling of 1221473072 in words is "one billion, two hundred twenty-one million, four hundred seventy-three thousand, seventy-two".