1550725 has 12 divisors (see below), whose sum is σ = 2098080. Its totient is φ = 1127600.

The previous prime is 1550701. The next prime is 1550737. The reversal of 1550725 is 5270551.

It is a happy number.

It is not a de Polignac number, because 1550725 - 2⁵ = 1550693 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (25).

1550725 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 1550725.

It is a congruent number.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 2545 + ... + 3094.

It is an arithmetic number, because the mean of its divisors is an integer number (174840).

2^1550725 is an apocalyptic number.

It is an amenable number.

1550725 is a deficient number, since it is larger than the sum of its proper divisors (547355).

1550725 is a wasteful number, since it uses less digits than its factorization.

1550725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5660 (or 5655 counting only the distinct ones).

The product of its (nonzero) digits is 1750, while the sum is 25.

The square root of 1550725 is about 1245.2810927658. The cubic root of 1550725 is about 115.7474937531.

The spelling of 1550725 in words is "one million, five hundred fifty thousand, seven hundred twenty-five".