1506643 has 8 divisors (see below), whose sum is σ = 1598400. Its totient is φ = 1416168.

The previous prime is 1506641. The next prime is 1506649. The reversal of 1506643 is 3466051.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1506643 - 2¹ = 1506641 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1506641) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3180 + ... + 3622.

It is an arithmetic number, because the mean of its divisors is an integer number (199800).

2^1506643 is an apocalyptic number.

1506643 is a deficient number, since it is larger than the sum of its proper divisors (91757).

1506643 is a wasteful number, since it uses less digits than its factorization.

1506643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 641.

The product of its (nonzero) digits is 2160, while the sum is 25.

The square root of 1506643 is about 1227.4538687869. The cubic root of 1506643 is about 114.6401606678.

The spelling of 1506643 in words is "one million, five hundred six thousand, six hundred forty-three".