1267320423 has 8 divisors (see below), whose sum is σ = 1707181168. Its totient is φ = 836169984.

The previous prime is 1267320409. The next prime is 1267320497. The reversal of 1267320423 is 3240237621.

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

It is not a de Polignac number, because 1267320423 - 2⁸ = 1267320167 is a prime.

It is a super-2 number, since 2×1267320423² = 3212202109105797858, 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 (1267327423) 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, 2177236 + ... + 2177817.

It is an arithmetic number, because the mean of its divisors is an integer number (213397646).

Almost surely, 2^1267320423 is an apocalyptic number.

1267320423 is a deficient number, since it is larger than the sum of its proper divisors (439860745).

1267320423 is an equidigital number, since it uses as much as digits as its factorization.

1267320423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4355153.

The product of its (nonzero) digits is 12096, while the sum is 30.

The square root of 1267320423 is about 35599.4441389188. Note that the first 3 decimals coincide. The cubic root of 1267320423 is about 1082.1699692440.

The spelling of 1267320423 in words is "one billion, two hundred sixty-seven million, three hundred twenty thousand, four hundred twenty-three".