1267223131 has 4 divisors (see below), whose sum is σ = 1268911264. Its totient is φ = 1265535000.

The previous prime is 1267223119. The next prime is 1267223147. The reversal of 1267223131 is 1313227621.

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 1267223131 - 2⁵ = 1267223099 is a prime.

It is a super-2 number, since 2×1267223131² = 3211708927482886322, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1267223131.

It is not an unprimeable number, because it can be changed into a prime (1267223431) 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, 842940 + ... + 844441.

It is an arithmetic number, because the mean of its divisors is an integer number (317227816).

Almost surely, 2^1267223131 is an apocalyptic number.

1267223131 is a deficient number, since it is larger than the sum of its proper divisors (1688133).

1267223131 is an equidigital number, since it uses as much as digits as its factorization.

1267223131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1688132.

The product of its digits is 3024, while the sum is 28.

The square root of 1267223131 is about 35598.0776306811. The cubic root of 1267223131 is about 1082.1422758596.

The spelling of 1267223131 in words is "one billion, two hundred sixty-seven million, two hundred twenty-three thousand, one hundred thirty-one".