1645413 has 32 divisors (see below), whose sum is σ = 2903040. Its totient is φ = 802560.

The previous prime is 1645409. The next prime is 1645417. The reversal of 1645413 is 3145461.

It is an interprime number because it is at equal distance from previous prime (1645409) and next prime (1645417).

It is not a de Polignac number, because 1645413 - 2² = 1645409 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1645417) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3718 + ... + 4136.

It is an arithmetic number, because the mean of its divisors is an integer number (90720).

2^1645413 is an apocalyptic number.

It is an amenable number.

1645413 is a deficient number, since it is larger than the sum of its proper divisors (1257627).

1645413 is a wasteful number, since it uses less digits than its factorization.

1645413 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 457.

The product of its digits is 1440, while the sum is 24.

The square root of 1645413 is about 1282.7365278965. The cubic root of 1645413 is about 118.0569723926.

The spelling of 1645413 in words is "one million, six hundred forty-five thousand, four hundred thirteen".