1506645 has 24 divisors (see below), whose sum is σ = 2985216. Its totient is φ = 688608.

The previous prime is 1506641. The next prime is 1506649. The reversal of 1506645 is 5466051.

It is a happy number.

1506645 is a `hidden beast` number, since 15 + 0 + 6 + 645 = 666.

It is an interprime number because it is at equal distance from previous prime (1506641) and next prime (1506649).

It is not a de Polignac number, because 1506645 - 2² = 1506641 is a prime.

It is a congruent 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 23 ways as a sum of consecutive naturals, for example, 2077 + ... + 2706.

It is an arithmetic number, because the mean of its divisors is an integer number (124384).

2^1506645 is an apocalyptic number.

1506645 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1506645 is a deficient number, since it is larger than the sum of its proper divisors (1478571).

1506645 is a wasteful number, since it uses less digits than its factorization.

1506645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4801 (or 4798 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 27.

The square root of 1506645 is about 1227.4546834812. The cubic root of 1506645 is about 114.6402113943.

The spelling of 1506645 in words is "one million, five hundred six thousand, six hundred forty-five".