1267551 has 6 divisors (see below), whose sum is σ = 1830920. Its totient is φ = 845028.

The previous prime is 1267549. The next prime is 1267577. The reversal of 1267551 is 1557621.

It is not a de Polignac number, because 1267551 - 2¹ = 1267549 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1267501) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 70411 + ... + 70428.

2^1267551 is an apocalyptic number.

1267551 is a deficient number, since it is larger than the sum of its proper divisors (563369).

1267551 is a wasteful number, since it uses less digits than its factorization.

1267551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140845 (or 140842 counting only the distinct ones).

The product of its digits is 2100, while the sum is 27.

The square root of 1267551 is about 1125.8556745871. The cubic root of 1267551 is about 108.2235595471.

It can be divided in two parts, 126755 and 1, that added together give a triangular number (126756 = T₅₀₃).

The spelling of 1267551 in words is "one million, two hundred sixty-seven thousand, five hundred fifty-one".