1645364 has 12 divisors (see below), whose sum is σ = 3290784. Its totient is φ = 705144.

The previous prime is 1645363. The next prime is 1645367. The reversal of 1645364 is 4635461.

It is a happy number.

1645364 is an admirable number.

It is a plaindrome in base 15.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1645363) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 29354 + ... + 29409.

It is an arithmetic number, because the mean of its divisors is an integer number (274232).

2^1645364 is an apocalyptic number.

1645364 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

1645364 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

1645364 is a wasteful number, since it uses less digits than its factorization.

1645364 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58774 (or 58772 counting only the distinct ones).

The product of its digits is 8640, while the sum is 29.

The square root of 1645364 is about 1282.7174279630. The cubic root of 1645364 is about 118.0558004783.

The spelling of 1645364 in words is "one million, six hundred forty-five thousand, three hundred sixty-four".