1213641269 has 8 divisors (see below), whose sum is σ = 1251599040. Its totient is φ = 1176263200.

The previous prime is 1213641257. The next prime is 1213641277. The reversal of 1213641269 is 9621463121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1213641269 is a prime.

It is a super-2 number, since 2×1213641269² = 2945850259639860722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1213641229) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 140672 + ... + 149049.

It is an arithmetic number, because the mean of its divisors is an integer number (156449880).

Almost surely, 2^1213641269 is an apocalyptic number.

It is an amenable number.

1213641269 is a deficient number, since it is larger than the sum of its proper divisors (37957771).

1213641269 is an equidigital number, since it uses as much as digits as its factorization.

1213641269 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 289851.

The product of its digits is 15552, while the sum is 35.

The square root of 1213641269 is about 34837.3545063341. The cubic root of 1213641269 is about 1066.6700766276.

The spelling of 1213641269 in words is "one billion, two hundred thirteen million, six hundred forty-one thousand, two hundred sixty-nine".