1225662420 has 24 divisors (see below), whose sum is σ = 3431854944. Its totient is φ = 326843296.

The previous prime is 1225662391. The next prime is 1225662437. The reversal of 1225662420 is 242665221.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10213794 + ... + 10213913.

It is an arithmetic number, because the mean of its divisors is an integer number (142993956).

Almost surely, 2^1225662420 is an apocalyptic number.

1225662420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1225662420 is an abundant number, since it is smaller than the sum of its proper divisors (2206192524).

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

1225662420 is a wasteful number, since it uses less digits than its factorization.

1225662420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20427719 (or 20427717 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 30.

The square root of 1225662420 is about 35009.4618639019. The cubic root of 1225662420 is about 1070.1803114187.

The spelling of 1225662420 in words is "one billion, two hundred twenty-five million, six hundred sixty-two thousand, four hundred twenty".