1219064871 has 24 divisors (see below), whose sum is σ = 1720535040. Its totient is φ = 767664144.

The previous prime is 1219064839. The next prime is 1219064881. The reversal of 1219064871 is 1784609121.

It is not a de Polignac number, because 1219064871 - 2⁵ = 1219064839 is a prime.

It is a super-2 number, since 2×1219064871² = 2972238319412493282, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1219064831) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 413320 + ... + 416258.

It is an arithmetic number, because the mean of its divisors is an integer number (71688960).

Almost surely, 2^1219064871 is an apocalyptic number.

1219064871 is a deficient number, since it is larger than the sum of its proper divisors (501470169).

1219064871 is a wasteful number, since it uses less digits than its factorization.

1219064871 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3363 (or 3344 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 39.

The square root of 1219064871 is about 34915.1094943149. The cubic root of 1219064871 is about 1068.2566513113.

The spelling of 1219064871 in words is "one billion, two hundred nineteen million, sixty-four thousand, eight hundred seventy-one".