1267405 has 4 divisors (see below), whose sum is σ = 1520892. Its totient is φ = 1013920.

The previous prime is 1267403. The next prime is 1267411. The reversal of 1267405 is 5047621.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 885481 + 381924 = 941^2 + 618^2 .

It is not a de Polignac number, because 1267405 - 2¹ = 1267403 is a prime.

It is a Duffinian number.

It is a plaindrome in base 16.

It is a self number, because there is not a number n which added to its sum of digits gives 1267405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1267403) 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, 126736 + ... + 126745.

It is an arithmetic number, because the mean of its divisors is an integer number (380223).

2^1267405 is an apocalyptic number.

It is an amenable number.

1267405 is a deficient number, since it is larger than the sum of its proper divisors (253487).

1267405 is an equidigital number, since it uses as much as digits as its factorization.

1267405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 253486.

The product of its (nonzero) digits is 1680, while the sum is 25.

The square root of 1267405 is about 1125.7908331480. The cubic root of 1267405 is about 108.2194042254.

The spelling of 1267405 in words is "one million, two hundred sixty-seven thousand, four hundred five".