1225710620 has 12 divisors (see below), whose sum is σ = 2573992344. Its totient is φ = 490284240.

The previous prime is 1225710613. The next prime is 1225710631. The reversal of 1225710620 is 260175221.

It is a self number, because there is not a number n which added to its sum of digits gives 1225710620.

It is a congruent number.

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, 30642746 + ... + 30642785.

It is an arithmetic number, because the mean of its divisors is an integer number (214499362).

Almost surely, 2^1225710620 is an apocalyptic number.

1225710620 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1225710620 is an abundant number, since it is smaller than the sum of its proper divisors (1348281724).

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

1225710620 is a wasteful number, since it uses less digits than its factorization.

1225710620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61285540 (or 61285538 counting only the distinct ones).

The product of its (nonzero) digits is 1680, while the sum is 26.

The square root of 1225710620 is about 35010.1502424654. The cubic root of 1225710620 is about 1070.1943397553.

Adding to 1225710620 its reverse (260175221), we get a palindrome (1485885841).

The spelling of 1225710620 in words is "one billion, two hundred twenty-five million, seven hundred ten thousand, six hundred twenty".