1645252 has 24 divisors (see below), whose sum is σ = 3343424. Its totient is φ = 693792.

The previous prime is 1645249. The next prime is 1645253. The reversal of 1645252 is 2525461.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1645253) 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, 1438 + ... + 2314.

2^1645252 is an apocalyptic number.

It is an amenable number.

1645252 is an abundant number, since it is smaller than the sum of its proper divisors (1698172).

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

1645252 is a wasteful number, since it uses less digits than its factorization.

1645252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 955 (or 953 counting only the distinct ones).

The product of its digits is 2400, while the sum is 25.

The square root of 1645252 is about 1282.6737699041. The cubic root of 1645252 is about 118.0531217297.

It can be divided in two parts, 164 and 5252, that multiplied together give a triangular number (861328 = T₁₃₁₂).

The spelling of 1645252 in words is "one million, six hundred forty-five thousand, two hundred fifty-two".