1645464 has 64 divisors (see below), whose sum is σ = 4514400. Its totient is φ = 497664.

The previous prime is 1645463. The next prime is 1645477. The reversal of 1645464 is 4645461.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1645463) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15042 + ... + 15150.

2^1645464 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1645464, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2257200).

1645464 is an abundant number, since it is smaller than the sum of its proper divisors (2868936).

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

1645464 is a wasteful number, since it uses less digits than its factorization.

1645464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 172 (or 168 counting only the distinct ones).

The product of its digits is 11520, while the sum is 30.

The square root of 1645464 is about 1282.7564071171. The cubic root of 1645464 is about 118.0581921154.

The spelling of 1645464 in words is "one million, six hundred forty-five thousand, four hundred sixty-four".