1216471270 has 64 divisors (see below), whose sum is σ = 2562938496. Its totient is φ = 407116800.

The previous prime is 1216471183. The next prime is 1216471273. The reversal of 1216471270 is 721746121.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1216471273) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 514932 + ... + 517288.

It is an arithmetic number, because the mean of its divisors is an integer number (40045914).

Almost surely, 2^1216471270 is an apocalyptic number.

1216471270 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1216471270 is an abundant number, since it is smaller than the sum of its proper divisors (1346467226).

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

1216471270 is a wasteful number, since it uses less digits than its factorization.

1216471270 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2545.

The product of its (nonzero) digits is 4704, while the sum is 31.

The square root of 1216471270 is about 34877.9481907982. The cubic root of 1216471270 is about 1067.4985295791.

The spelling of 1216471270 in words is "one billion, two hundred sixteen million, four hundred seventy-one thousand, two hundred seventy".