1506861 has 6 divisors (see below), whose sum is σ = 2176590. Its totient is φ = 1004568.

The previous prime is 1506851. The next prime is 1506877. The reversal of 1506861 is 1686051.

It can be written as a sum of positive squares in only one way, i.e., 1425636 + 81225 = 1194^2 + 285^2 .

It is not a de Polignac number, because 1506861 - 2⁶ = 1506797 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1506851) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 83706 + ... + 83723.

It is an arithmetic number, because the mean of its divisors is an integer number (362765).

2^1506861 is an apocalyptic number.

It is an amenable number.

1506861 is a deficient number, since it is larger than the sum of its proper divisors (669729).

1506861 is a wasteful number, since it uses less digits than its factorization.

1506861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 167435 (or 167432 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 27.

The square root of 1506861 is about 1227.5426672829. The cubic root of 1506861 is about 114.6456895931.

It can be divided in two parts, 15068 and 61, that added together give a square (15129 = 123²).

The spelling of 1506861 in words is "one million, five hundred six thousand, eight hundred sixty-one".