1501866 has 12 divisors (see below), whose sum is σ = 3254082. Its totient is φ = 500616.

The previous prime is 1501859. The next prime is 1501873. The reversal of 1501866 is 6681051.

It is an interprime number because it is at equal distance from previous prime (1501859) and next prime (1501873).

It can be written as a sum of positive squares in only one way, i.e., 1490841 + 11025 = 1221^2 + 105^2 .

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, 41701 + ... + 41736.

2^1501866 is an apocalyptic number.

1501866 is an abundant number, since it is smaller than the sum of its proper divisors (1752216).

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

1501866 is a wasteful number, since it uses less digits than its factorization.

1501866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83445 (or 83442 counting only the distinct ones).

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

The square root of 1501866 is about 1225.5064259317. The cubic root of 1501866 is about 114.5188720697.

It can be divided in two parts, 150 and 1866, that added together give a triangular number (2016 = T₆₃).

The spelling of 1501866 in words is "one million, five hundred one thousand, eight hundred sixty-six".