816145 has 24 divisors (see below), whose sum is σ = 1149120. Its totient is φ = 554400.

The previous prime is 816133. The next prime is 816157. The reversal of 816145 is 541618.

It is an interprime number because it is at equal distance from previous prime (816133) and next prime (816157).

It is not a de Polignac number, because 816145 - 2⁵ = 816113 is a prime.

It is a super-2 number, since 2×816145² = 1332185322050, which contains 22 as substring.

It is a hoax number, since the sum of its digits (25) coincides with the sum of the digits of its distinct prime factors.

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

It is a nialpdrome in base 16.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 11460 + ... + 11530.

It is an arithmetic number, because the mean of its divisors is an integer number (47880).

2⁸¹⁶¹⁴⁵ is an apocalyptic number.

It is an amenable number.

816145 is a deficient number, since it is larger than the sum of its proper divisors (332975).

816145 is a wasteful number, since it uses less digits than its factorization.

816145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 117 (or 106 counting only the distinct ones).

The product of its digits is 960, while the sum is 25.

The square root of 816145 is about 903.4074385348. The cubic root of 816145 is about 93.4521092692.

It can be divided in two parts, 816 and 145, that added together give a square (961 = 31²).

The spelling of 816145 in words is "eight hundred sixteen thousand, one hundred forty-five".