1225243320 has 64 divisors (see below), whose sum is σ = 4200837120. Its totient is φ = 280055424.

The previous prime is 1225243309. The next prime is 1225243337. The reversal of 1225243320 is 233425221.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 728472 + ... + 730151.

It is an arithmetic number, because the mean of its divisors is an integer number (65638080).

Almost surely, 2^1225243320 is an apocalyptic number.

1225243320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1225243320 is an abundant number, since it is smaller than the sum of its proper divisors (2975593800).

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

1225243320 is a wasteful number, since it uses less digits than its factorization.

1225243320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1458644 (or 1458640 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 24.

The square root of 1225243320 is about 35003.4758274089. The cubic root of 1225243320 is about 1070.0583192367.

Adding to 1225243320 its reverse (233425221), we get a palindrome (1458668541).

The spelling of 1225243320 in words is "one billion, two hundred twenty-five million, two hundred forty-three thousand, three hundred twenty".