1305057 has 16 divisors (see below), whose sum is σ = 1897280. Its totient is φ = 793152.

The previous prime is 1305047. The next prime is 1305061. The reversal of 1305057 is 7505031.

It is a happy number.

It is not a de Polignac number, because 1305057 - 2⁷ = 1304929 is a prime.

It is a Duffinian number.

1305057 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (1305047) 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, 4098 + ... + 4404.

It is an arithmetic number, because the mean of its divisors is an integer number (118580).

2^1305057 is an apocalyptic number.

It is an amenable number.

1305057 is a deficient number, since it is larger than the sum of its proper divisors (592223).

1305057 is a wasteful number, since it uses less digits than its factorization.

1305057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 432.

The product of its (nonzero) digits is 525, while the sum is 21.

The square root of 1305057 is about 1142.3909138294. The cubic root of 1305057 is about 109.2806224781.

The spelling of 1305057 in words is "one million, three hundred five thousand, fifty-seven".