1255551 has 8 divisors (see below), whose sum is σ = 1826304. Its totient is φ = 760920.

The previous prime is 1255549. The next prime is 1255559. The reversal of 1255551 is 1555521.

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

It is not a de Polignac number, because 1255551 - 2¹ = 1255549 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1255559) 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, 18991 + ... + 19056.

It is an arithmetic number, because the mean of its divisors is an integer number (228288).

2^1255551 is an apocalyptic number.

1255551 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1255551 is a deficient number, since it is larger than the sum of its proper divisors (570753).

1255551 is a wasteful number, since it uses less digits than its factorization.

1255551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38061.

The product of its digits is 1250, while the sum is 24.

The square root of 1255551 is about 1120.5137214689. The cubic root of 1255551 is about 107.8809559363.

It can be divided in two parts, 1 and 255551, that added together give a palindrome (255552).

The spelling of 1255551 in words is "one million, two hundred fifty-five thousand, five hundred fifty-one".