1245555 has 24 divisors (see below), whose sum is σ = 2190240. Its totient is φ = 654720.

The previous prime is 1245551. The next prime is 1245557. The reversal of 1245555 is 5555421.

It is not a de Polignac number, because 1245555 - 2² = 1245551 is a prime.

It is a plaindrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1245551) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3850 + ... + 4160.

It is an arithmetic number, because the mean of its divisors is an integer number (91260).

2^1245555 is an apocalyptic number.

1245555 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1245555 is a deficient number, since it is larger than the sum of its proper divisors (944685).

1245555 is a wasteful number, since it uses less digits than its factorization.

1245555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 411 (or 408 counting only the distinct ones).

The product of its digits is 5000, while the sum is 27.

The square root of 1245555 is about 1116.0443539573. The cubic root of 1245555 is about 107.5938966886.

The spelling of 1245555 in words is "one million, two hundred forty-five thousand, five hundred fifty-five".