897155 has 8 divisors (see below), whose sum is σ = 1230432. Its totient is φ = 615168.

The previous prime is 897137. The next prime is 897157. The reversal of 897155 is 551798.

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 897155 - 2¹² = 893059 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (35), and also a Moran number because the ratio is a prime number: 25633 = 897155 / (8 + 9 + 7 + 1 + 5 + 5).

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (897157) 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, 12782 + ... + 12851.

It is an arithmetic number, because the mean of its divisors is an integer number (153804).

2⁸⁹⁷¹⁵⁵ is an apocalyptic number.

897155 is a deficient number, since it is larger than the sum of its proper divisors (333277).

897155 is a wasteful number, since it uses less digits than its factorization.

897155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25645.

The product of its digits is 12600, while the sum is 35.

The square root of 897155 is about 947.1826645373. The cubic root of 897155 is about 96.4470971004.

The spelling of 897155 in words is "eight hundred ninety-seven thousand, one hundred fifty-five".