1267644 has 24 divisors (see below), whose sum is σ = 3380608. Its totient is φ = 362160.

The previous prime is 1267633. The next prime is 1267649. The reversal of 1267644 is 4467621.

It is a Smith number, since the sum of its digits (30) coincides with the sum of the digits of its prime factors.

It is a nude number because it is divisible by every one of its digits.

It is a plaindrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1267649) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7462 + ... + 7629.

2^1267644 is an apocalyptic number.

1267644 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

1267644 is an abundant number, since it is smaller than the sum of its proper divisors (2112964).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1267644 is a wasteful number, since it uses less digits than its factorization.

1267644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15105 (or 15103 counting only the distinct ones).

The product of its digits is 8064, while the sum is 30.

The square root of 1267644 is about 1125.8969757487. The cubic root of 1267644 is about 108.2262062637.

It can be divided in two parts, 12676 and 44, that added together give a triangular number (12720 = T₁₅₉).

The spelling of 1267644 in words is "one million, two hundred sixty-seven thousand, six hundred forty-four".