1212755125 has 8 divisors (see below), whose sum is σ = 1513518552. Its totient is φ = 970204000.

The previous prime is 1212755119. The next prime is 1212755143. The reversal of 1212755125 is 5215572121.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 305480484 + 907274641 = 17478^2 + 30121^2 .

It is not a de Polignac number, because 1212755125 - 2²⁹ = 675884213 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4850896 + ... + 4851145.

It is an arithmetic number, because the mean of its divisors is an integer number (189189819).

Almost surely, 2^1212755125 is an apocalyptic number.

It is an amenable number.

1212755125 is a deficient number, since it is larger than the sum of its proper divisors (300763427).

1212755125 is an frugal number, since it uses more digits than its factorization.

1212755125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9702056 (or 9702046 counting only the distinct ones).

The product of its digits is 7000, while the sum is 31.

The square root of 1212755125 is about 34824.6338817797. The cubic root of 1212755125 is about 1066.4104025766.

The spelling of 1212755125 in words is "one billion, two hundred twelve million, seven hundred fifty-five thousand, one hundred twenty-five".