1212959140 has 12 divisors (see below), whose sum is σ = 2547214236. Its totient is φ = 485183648.

The previous prime is 1212959087. The next prime is 1212959159. The reversal of 1212959140 is 419592121.

It can be written as a sum of positive squares in 2 ways, for example, as 509224356 + 703734784 = 22566^2 + 26528^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1212959096 and 1212959105.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30323959 + ... + 30323998.

It is an arithmetic number, because the mean of its divisors is an integer number (212267853).

Almost surely, 2^1212959140 is an apocalyptic number.

1212959140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1212959140 is an abundant number, since it is smaller than the sum of its proper divisors (1334255096).

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

1212959140 is a wasteful number, since it uses less digits than its factorization.

1212959140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60647966 (or 60647964 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 34.

The square root of 1212959140 is about 34827.5629351237. The cubic root of 1212959140 is about 1066.4701979728.

The spelling of 1212959140 in words is "one billion, two hundred twelve million, nine hundred fifty-nine thousand, one hundred forty".