1045815 has 16 divisors (see below), whose sum is σ = 1690848. Its totient is φ = 551936.

The previous prime is 1045801. The next prime is 1045819. The reversal of 1045815 is 5185401.

It is a 10-Lehmer number, since φ(1045815) divides (1045815-1)¹⁰.

It is a cyclic number.

It is not a de Polignac number, because 1045815 - 2⁴ = 1045799 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1045819) 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, 1387 + ... + 2003.

It is an arithmetic number, because the mean of its divisors is an integer number (105678).

2^1045815 is an apocalyptic number.

1045815 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1045815 is a deficient number, since it is larger than the sum of its proper divisors (645033).

1045815 is a wasteful number, since it uses less digits than its factorization.

1045815 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 738.

The product of its (nonzero) digits is 800, while the sum is 24.

The square root of 1045815 is about 1022.6509668504. The cubic root of 1045815 is about 101.5044203629.

The spelling of 1045815 in words is "one million, forty-five thousand, eight hundred fifteen".