1649025 has 48 divisors (see below), whose sum is σ = 3472000. Its totient is φ = 751680.

The previous prime is 1649023. The next prime is 1649059. The reversal of 1649025 is 5209461.

It is not a de Polignac number, because 1649025 - 2¹ = 1649023 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a self number, because there is not a number n which added to its sum of digits gives 1649025.

It is not an unprimeable number, because it can be changed into a prime (1649023) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 4551 + ... + 4899.

2^1649025 is an apocalyptic number.

1649025 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1649025 is an abundant number, since it is smaller than the sum of its proper divisors (1822975).

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

1649025 is a wasteful number, since it uses less digits than its factorization.

1649025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 375 (or 364 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 27.

The square root of 1649025 is about 1284.1436835495. The cubic root of 1649025 is about 118.1432952262.

1649025 divided by its sum of digits (27) gives a triangular number (61075 = T₃₄₉).

The spelling of 1649025 in words is "one million, six hundred forty-nine thousand, twenty-five".