1204221240 has 96 divisors (see below), whose sum is σ = 4019539680. Its totient is φ = 312443136.

The previous prime is 1204221233. The next prime is 1204221251. The reversal of 1204221240 is 421224021.

1204221240 is a `hidden beast` number, since 1 + 2 + 0 + 422 + 1 + 240 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 31884 + ... + 58523.

It is an arithmetic number, because the mean of its divisors is an integer number (41870205).

Almost surely, 2^1204221240 is an apocalyptic number.

1204221240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1204221240 is an abundant number, since it is smaller than the sum of its proper divisors (2815318440).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1204221240 is a wasteful number, since it uses less digits than its factorization.

1204221240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90461 (or 90454 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

The square root of 1204221240 is about 34701.8910147560. The cubic root of 1204221240 is about 1063.9031489849.

Adding to 1204221240 its reverse (421224021), we get a palindrome (1625445261).

The spelling of 1204221240 in words is "one billion, two hundred four million, two hundred twenty-one thousand, two hundred forty".