1255215 has 32 divisors (see below), whose sum is σ = 2229696. Its totient is φ = 599040.

The previous prime is 1255211. The next prime is 1255237. The reversal of 1255215 is 5125521.

It is not a de Polignac number, because 1255215 - 2² = 1255211 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1255191 and 1255200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1255211) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7917 + ... + 8073.

It is an arithmetic number, because the mean of its divisors is an integer number (69678).

2^1255215 is an apocalyptic number.

1255215 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1255215 is a deficient number, since it is larger than the sum of its proper divisors (974481).

1255215 is a wasteful number, since it uses less digits than its factorization.

1255215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 219.

The product of its digits is 500, while the sum is 21.

The square root of 1255215 is about 1120.3637802071. The cubic root of 1255215 is about 107.8713316797.

The spelling of 1255215 in words is "one million, two hundred fifty-five thousand, two hundred fifteen".