1217123270 has 48 divisors (see below), whose sum is σ = 2453658480. Its totient is φ = 434216640.

The previous prime is 1217123263. The next prime is 1217123291. The reversal of 1217123270 is 723217121.

1217123270 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 54641 + ... + 73619.

It is an arithmetic number, because the mean of its divisors is an integer number (51117885).

Almost surely, 2^1217123270 is an apocalyptic number.

1217123270 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1217123270 is an abundant number, since it is smaller than the sum of its proper divisors (1236535210).

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

1217123270 is a wasteful number, since it uses less digits than its factorization.

1217123270 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19061 (or 19050 counting only the distinct ones).

The product of its (nonzero) digits is 1176, while the sum is 26.

The square root of 1217123270 is about 34887.2938188103. The cubic root of 1217123270 is about 1067.6892135537.

The spelling of 1217123270 in words is "one billion, two hundred seventeen million, one hundred twenty-three thousand, two hundred seventy".