1268551 has 8 divisors (see below), whose sum is σ = 1323008. Its totient is φ = 1215000.

The previous prime is 1268549. The next prime is 1268563. The reversal of 1268551 is 1558621.

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

It is a 3-Lehmer number, since φ(1268551) divides (1268551-1)³.

It is a cyclic number.

It is not a de Polignac number, because 1268551 - 2¹ = 1268549 is a prime.

It is an Ulam number.

It is a deceptive number, since it divides R_1268550.

It is a Duffinian number.

1268551 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1268051) 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, 4546 + ... + 4816.

It is an arithmetic number, because the mean of its divisors is an integer number (165376).

2^1268551 is an apocalyptic number.

1268551 is a deficient number, since it is larger than the sum of its proper divisors (54457).

1268551 is a wasteful number, since it uses less digits than its factorization.

1268551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 453.

The product of its digits is 2400, while the sum is 28.

The square root of 1268551 is about 1126.2996936873. The cubic root of 1268551 is about 108.2520120806.

The spelling of 1268551 in words is "one million, two hundred sixty-eight thousand, five hundred fifty-one".