1306657 has 4 divisors (see below), whose sum is σ = 1425456. Its totient is φ = 1187860.

The previous prime is 1306633. The next prime is 1306661. The reversal of 1306657 is 7566031.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1306657 - 2¹¹ = 1304609 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1306667) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 59383 + ... + 59404.

It is an arithmetic number, because the mean of its divisors is an integer number (356364).

2^1306657 is an apocalyptic number.

It is an amenable number.

1306657 is a deficient number, since it is larger than the sum of its proper divisors (118799).

1306657 is a wasteful number, since it uses less digits than its factorization.

1306657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 118798.

The product of its (nonzero) digits is 3780, while the sum is 28.

The square root of 1306657 is about 1143.0909850051. The cubic root of 1306657 is about 109.3252635907.

The spelling of 1306657 in words is "one million, three hundred six thousand, six hundred fifty-seven".