1212725560 has 32 divisors (see below), whose sum is σ = 2792093040. Its totient is φ = 473808384.

The previous prime is 1212725543. The next prime is 1212725581. The reversal of 1212725560 is 655272121.

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, 350817 + ... + 354256.

Almost surely, 2^1212725560 is an apocalyptic number.

1212725560 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1212725560 is an abundant number, since it is smaller than the sum of its proper divisors (1579367480).

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

1212725560 is a wasteful number, since it uses less digits than its factorization.

1212725560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 705127 (or 705123 counting only the distinct ones).

The product of its (nonzero) digits is 8400, while the sum is 31.

The square root of 1212725560 is about 34824.2093951894. The cubic root of 1212725560 is about 1066.4017367217.

Adding to 1212725560 its reverse (655272121), we get a palindrome (1867997681).

The spelling of 1212725560 in words is "one billion, two hundred twelve million, seven hundred twenty-five thousand, five hundred sixty".