1851265 has 16 divisors (see below), whose sum is σ = 2520000. Its totient is φ = 1294272.

The previous prime is 1851259. The next prime is 1851271. The reversal of 1851265 is 5621581.

It is an interprime number because it is at equal distance from previous prime (1851259) and next prime (1851271).

It is a cyclic number.

It is not a de Polignac number, because 1851265 - 2¹¹ = 1849217 is a prime.

1851265 is a lucky number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 486 + ... + 1984.

It is an arithmetic number, because the mean of its divisors is an integer number (157500).

2^1851265 is an apocalyptic number.

It is an amenable number.

1851265 is a deficient number, since it is larger than the sum of its proper divisors (668735).

1851265 is a wasteful number, since it uses less digits than its factorization.

1851265 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1536.

The product of its digits is 2400, while the sum is 28.

The square root of 1851265 is about 1360.6119946553. The cubic root of 1851265 is about 122.7880766999.

It can be divided in two parts, 1851 and 265, that added together give a square (2116 = 46²).

The spelling of 1851265 in words is "one million, eight hundred fifty-one thousand, two hundred sixty-five".