1267431201 has 9 divisors (see below), whose sum is σ = 1830888241. Its totient is φ = 844882932.

The previous prime is 1267431173. The next prime is 1267431203. The reversal of 1267431201 is 1021347621.

The square root of 1267431201 is 35601.

It is a perfect power (a square), and thus also a powerful number.

1267431201 is a `hidden beast` number, since 1 + 26 + 7 + 431 + 201 = 666.

1267431201 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (9).

It is not a de Polignac number, because 1267431201 - 2²⁵ = 1233876769 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1267431203) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 100870 + ... + 112736.

Almost surely, 2^1267431201 is an apocalyptic number.

1267431201 is the 35601-st square number.

1267431201 is the 17801-st centered octagonal number.

It is an amenable number.

1267431201 is a deficient number, since it is larger than the sum of its proper divisors (563457040).

1267431201 is an frugal number, since it uses more digits than its factorization.

1267431201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23740 (or 11870 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 27.

The cubic root of 1267431201 is about 1082.2014995841.

Adding to 1267431201 its reverse (1021347621), we get a palindrome (2288778822).

The spelling of 1267431201 in words is "one billion, two hundred sixty-seven million, four hundred thirty-one thousand, two hundred one".