1445866 has 4 divisors (see below), whose sum is σ = 2168802. Its totient is φ = 722932.

The previous prime is 1445863. The next prime is 1445879. The reversal of 1445866 is 6685441.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 6685441 = 7 ⋅955063.

It can be written as a sum of positive squares in only one way, i.e., 1256641 + 189225 = 1121^2 + 435^2 .

It is not an unprimeable number, because it can be changed into a prime (1445863) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 361465 + ... + 361468.

2^1445866 is an apocalyptic number.

1445866 is a deficient number, since it is larger than the sum of its proper divisors (722936).

1445866 is an equidigital number, since it uses as much as digits as its factorization.

1445866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 722935.

The product of its digits is 23040, while the sum is 34.

The square root of 1445866 is about 1202.4416825776. The cubic root of 1445866 is about 113.0774523174.

The spelling of 1445866 in words is "one million, four hundred forty-five thousand, eight hundred sixty-six".