1225802920 has 16 divisors (see below), whose sum is σ = 2758056660. Its totient is φ = 490321152.

The previous prime is 1225802909. The next prime is 1225802957. The reversal of 1225802920 is 292085221.

It can be written as a sum of positive squares in 2 ways, for example, as 1141493796 + 84309124 = 33786^2 + 9182^2 .

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, 15322497 + ... + 15322576.

Almost surely, 2^1225802920 is an apocalyptic number.

1225802920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1225802920 is an abundant number, since it is smaller than the sum of its proper divisors (1532253740).

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

1225802920 is a wasteful number, since it uses less digits than its factorization.

1225802920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30645084 (or 30645080 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 31.

The square root of 1225802920 is about 35011.4684067949. The cubic root of 1225802920 is about 1070.2212021203.

The spelling of 1225802920 in words is "one billion, two hundred twenty-five million, eight hundred two thousand, nine hundred twenty".