1221432496 has 40 divisors (see below), whose sum is σ = 2403689904. Its totient is φ = 601159680.

The previous prime is 1221432479. The next prime is 1221432497. The reversal of 1221432496 is 6942341221.

It is not an unprimeable number, because it can be changed into a prime (1221432497) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 1028415 + ... + 1029601.

Almost surely, 2^1221432496 is an apocalyptic number.

1221432496 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1221432496 is a deficient number, since it is larger than the sum of its proper divisors (1182257408).

1221432496 is a wasteful number, since it uses less digits than its factorization.

1221432496 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2149 (or 2143 counting only the distinct ones).

The product of its digits is 20736, while the sum is 34.

The square root of 1221432496 is about 34948.9984978111. The cubic root of 1221432496 is about 1068.9477809315.

The spelling of 1221432496 in words is "one billion, two hundred twenty-one million, four hundred thirty-two thousand, four hundred ninety-six".