1255099 has 4 divisors (see below), whose sum is σ = 1259064. Its totient is φ = 1251136.

The previous prime is 1255081. The next prime is 1255103. The reversal of 1255099 is 9905521.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1255099 - 2⁷ = 1254971 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1255099.

It is not an unprimeable number, because it can be changed into a prime (1255039) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1462 + ... + 2155.

It is an arithmetic number, because the mean of its divisors is an integer number (314766).

2^1255099 is an apocalyptic number.

1255099 is a deficient number, since it is larger than the sum of its proper divisors (3965).

1255099 is an equidigital number, since it uses as much as digits as its factorization.

1255099 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3964.

The product of its (nonzero) digits is 4050, while the sum is 31.

The square root of 1255099 is about 1120.3120101115. The cubic root of 1255099 is about 107.8680086209.

The spelling of 1255099 in words is "one million, two hundred fifty-five thousand, ninety-nine".