1255309 has 8 divisors (see below), whose sum is σ = 1380960. Its totient is φ = 1131600.

The previous prime is 1255307. The next prime is 1255313. The reversal of 1255309 is 9035521.

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

It is a cyclic number.

It is not a de Polignac number, because 1255309 - 2¹ = 1255307 is a prime.

It is a Duffinian number.

1255309 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1255301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1119 + ... + 1939.

It is an arithmetic number, because the mean of its divisors is an integer number (172620).

2^1255309 is an apocalyptic number.

It is an amenable number.

1255309 is a deficient number, since it is larger than the sum of its proper divisors (125651).

1255309 is a wasteful number, since it uses less digits than its factorization.

1255309 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 971.

The product of its (nonzero) digits is 1350, while the sum is 25.

The square root of 1255309 is about 1120.4057300817. The cubic root of 1255309 is about 107.8740243531.

The spelling of 1255309 in words is "one million, two hundred fifty-five thousand, three hundred nine".