1213629272 has 16 divisors (see below), whose sum is σ = 2293474560. Its totient is φ = 602036064.

The previous prime is 1213629271. The next prime is 1213629281. The reversal of 1213629272 is 2729263121.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1213629271) 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, 596243 + ... + 598274.

It is an arithmetic number, because the mean of its divisors is an integer number (143342160).

Almost surely, 2^1213629272 is an apocalyptic number.

It is an amenable number.

1213629272 is a deficient number, since it is larger than the sum of its proper divisors (1079845288).

1213629272 is a wasteful number, since it uses less digits than its factorization.

1213629272 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1194650 (or 1194646 counting only the distinct ones).

The product of its digits is 18144, while the sum is 35.

The square root of 1213629272 is about 34837.1823200442. The cubic root of 1213629272 is about 1066.6665618924. Note that the first 3 decimals are identical.

The spelling of 1213629272 in words is "one billion, two hundred thirteen million, six hundred twenty-nine thousand, two hundred seventy-two".