1290127912 has 8 divisors (see below), whose sum is σ = 2418989850. Its totient is φ = 645063952.

The previous prime is 1290127903. The next prime is 1290127967. The reversal of 1290127912 is 2197210921.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 1097861956 + 192265956 = 33134^2 + 13866^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80632987 + ... + 80633002.

Almost surely, 2^1290127912 is an apocalyptic number.

It is an amenable number.

1290127912 is a deficient number, since it is larger than the sum of its proper divisors (1128861938).

1290127912 is a wasteful number, since it uses less digits than its factorization.

1290127912 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 161265995 (or 161265991 counting only the distinct ones).

The product of its (nonzero) digits is 4536, while the sum is 34.

The square root of 1290127912 is about 35918.3506302837. The cubic root of 1290127912 is about 1088.6232124628.

The spelling of 1290127912 in words is "one billion, two hundred ninety million, one hundred twenty-seven thousand, nine hundred twelve".