920557 has 8 divisors (see below), whose sum is σ = 1023840. Its totient is φ = 820560.

The previous prime is 920539. The next prime is 920561. The reversal of 920557 is 755029.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 920557 - 2¹⁹ = 396269 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (920357) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 207 + ... + 1372.

It is an arithmetic number, because the mean of its divisors is an integer number (127980).

2⁹²⁰⁵⁵⁷ is an apocalyptic number.

It is an amenable number.

920557 is a deficient number, since it is larger than the sum of its proper divisors (103283).

920557 is a wasteful number, since it uses less digits than its factorization.

920557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1643.

The product of its (nonzero) digits is 3150, while the sum is 28.

The square root of 920557 is about 959.4566170495. The cubic root of 920557 is about 97.2785066322.

The spelling of 920557 in words is "nine hundred twenty thousand, five hundred fifty-seven".