1217951229 has 16 divisors (see below), whose sum is σ = 1772921664. Its totient is φ = 737587200.

The previous prime is 1217951201. The next prime is 1217951249. The reversal of 1217951229 is 9221597121.

It is not a de Polignac number, because 1217951229 - 2⁵ = 1217951197 is a prime.

It is a super-2 number, since 2×1217951229² = 2966810392445220882, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1217951249) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 31869 + ... + 58749.

It is an arithmetic number, because the mean of its divisors is an integer number (110807604).

Almost surely, 2^1217951229 is an apocalyptic number.

It is an amenable number.

1217951229 is a deficient number, since it is larger than the sum of its proper divisors (554970435).

1217951229 is a wasteful number, since it uses less digits than its factorization.

1217951229 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28268.

The product of its digits is 22680, while the sum is 39.

The square root of 1217951229 is about 34899.1579984389. The cubic root of 1217951229 is about 1067.9312603923.

The spelling of 1217951229 in words is "one billion, two hundred seventeen million, nine hundred fifty-one thousand, two hundred twenty-nine".