870545 has 16 divisors (see below), whose sum is σ = 1149120. Its totient is φ = 629184.

The previous prime is 870533. The next prime is 870547. The reversal of 870545 is 545078.

It is a cyclic number.

It is not a de Polignac number, because 870545 - 2¹⁰ = 869521 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (870547) 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, 3722 + ... + 3948.

It is an arithmetic number, because the mean of its divisors is an integer number (71820).

2⁸⁷⁰⁵⁴⁵ is an apocalyptic number.

It is an amenable number.

870545 is a deficient number, since it is larger than the sum of its proper divisors (278575).

870545 is a wasteful number, since it uses less digits than its factorization.

870545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 304.

The product of its (nonzero) digits is 5600, while the sum is 29.

The square root of 870545 is about 933.0300102355. The cubic root of 870545 is about 95.4839569919.

The spelling of 870545 in words is "eight hundred seventy thousand, five hundred forty-five".