1307285 has 16 divisors (see below), whose sum is σ = 1838592. Its totient is φ = 873600.

The previous prime is 1307281. The next prime is 1307303. The reversal of 1307285 is 5827031.

1307285 = 176² + 177² + ... + 210².

It is not a de Polignac number, because 1307285 - 2² = 1307281 is a prime.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1307281) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 980 + ... + 1890.

It is an arithmetic number, because the mean of its divisors is an integer number (114912).

2^1307285 is an apocalyptic number.

It is an amenable number.

1307285 is a deficient number, since it is larger than the sum of its proper divisors (531307).

1307285 is an equidigital number, since it uses as much as digits as its factorization.

1307285 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 964.

The product of its (nonzero) digits is 1680, while the sum is 26.

The square root of 1307285 is about 1143.3656458019. The cubic root of 1307285 is about 109.3427752686.

The spelling of 1307285 in words is "one million, three hundred seven thousand, two hundred eighty-five".