1229915671 has 4 divisors (see below), whose sum is σ = 1242595312. Its totient is φ = 1217236032.

The previous prime is 1229915633. The next prime is 1229915681. The reversal of 1229915671 is 1765199221.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1229915671 - 2¹³ = 1229907479 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1229915681) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6339675 + ... + 6339868.

It is an arithmetic number, because the mean of its divisors is an integer number (310648828).

Almost surely, 2^1229915671 is an apocalyptic number.

1229915671 is a deficient number, since it is larger than the sum of its proper divisors (12679641).

1229915671 is an equidigital number, since it uses as much as digits as its factorization.

1229915671 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12679640.

The product of its digits is 68040, while the sum is 43.

The square root of 1229915671 is about 35070.1535639638. The cubic root of 1229915671 is about 1071.4167830686.

The spelling of 1229915671 in words is "one billion, two hundred twenty-nine million, nine hundred fifteen thousand, six hundred seventy-one".