1851264 has 48 divisors (see below), whose sum is σ = 5330520. Its totient is φ = 616704.

The previous prime is 1851259. The next prime is 1851271. The reversal of 1851264 is 4621581.

It is a tau number, because it is divible by the number of its divisors (48).

It is a zygodrome in base 2.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 349 + ... + 1955.

2^1851264 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1851264, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2665260).

1851264 is an abundant number, since it is smaller than the sum of its proper divisors (3479256).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1851264 is a wasteful number, since it uses less digits than its factorization.

1851264 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1627 (or 1612 counting only the distinct ones).

The product of its digits is 1920, while the sum is 27.

The square root of 1851264 is about 1360.6116271736. The cubic root of 1851264 is about 122.7880545911.

The spelling of 1851264 in words is "one million, eight hundred fifty-one thousand, two hundred sixty-four".