1212792128 has 14 divisors (see below), whose sum is σ = 2406634506. Its totient is φ = 606396032.

The previous prime is 1212792037. The next prime is 1212792131. The reversal of 1212792128 is 8212972121.

It can be written as a sum of positive squares in only one way, i.e., 848440384 + 364351744 = 29128^2 + 19088^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9474875 + ... + 9475002.

Almost surely, 2^1212792128 is an apocalyptic number.

It is an amenable number.

1212792128 is a deficient number, since it is larger than the sum of its proper divisors (1193842378).

1212792128 is an equidigital number, since it uses as much as digits as its factorization.

1212792128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18949889 (or 18949879 counting only the distinct ones).

The product of its digits is 8064, while the sum is 35.

The square root of 1212792128 is about 34825.1651539515. The cubic root of 1212792128 is about 1066.4212483997.

The spelling of 1212792128 in words is "one billion, two hundred twelve million, seven hundred ninety-two thousand, one hundred twenty-eight".