1284102772 has 12 divisors (see below), whose sum is σ = 2248124256. Its totient is φ = 641781560.

The previous prime is 1284102767. The next prime is 1284102793. The reversal of 1284102772 is 2772014821.

It is a happy number.

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, 56554 + ... + 75937.

It is an arithmetic number, because the mean of its divisors is an integer number (187343688).

Almost surely, 2^1284102772 is an apocalyptic number.

It is an amenable number.

1284102772 is a deficient number, since it is larger than the sum of its proper divisors (964021484).

1284102772 is a wasteful number, since it uses less digits than its factorization.

1284102772 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 134918 (or 134916 counting only the distinct ones).

The product of its (nonzero) digits is 12544, while the sum is 34.

The square root of 1284102772 is about 35834.3797490622. The cubic root of 1284102772 is about 1086.9258757023.

The spelling of 1284102772 in words is "one billion, two hundred eighty-four million, one hundred two thousand, seven hundred seventy-two".