1245655 has 4 divisors (see below), whose sum is σ = 1494792. Its totient is φ = 996520.

The previous prime is 1245649. The next prime is 1245683. The reversal of 1245655 is 5565421.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5565421 = 139 ⋅40039.

It is not a de Polignac number, because 1245655 - 2⁵ = 1245623 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 124561 + ... + 124570.

It is an arithmetic number, because the mean of its divisors is an integer number (373698).

2^1245655 is an apocalyptic number.

1245655 is a deficient number, since it is larger than the sum of its proper divisors (249137).

1245655 is an equidigital number, since it uses as much as digits as its factorization.

1245655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 249136.

The product of its digits is 6000, while the sum is 28.

The square root of 1245655 is about 1116.0891541450. The cubic root of 1245655 is about 107.5967760213.

The spelling of 1245655 in words is "one million, two hundred forty-five thousand, six hundred fifty-five".