1520205 has 8 divisors (see below), whose sum is σ = 2432352. Its totient is φ = 810768.

The previous prime is 1520203. The next prime is 1520213. The reversal of 1520205 is 5020251.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1520205 - 2¹ = 1520203 is a prime.

It is a super-2 number, since 2×1520205² = 4622046484050, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (15), and also a Moran number because the ratio is a prime number: 101347 = 1520205 / (1 + 5 + 2 + 0 + 2 + 0 + 5).

1520205 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1520203) 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 7 ways as a sum of consecutive naturals, for example, 50659 + ... + 50688.

It is an arithmetic number, because the mean of its divisors is an integer number (304044).

2^1520205 is an apocalyptic number.

1520205 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1520205 is a deficient number, since it is larger than the sum of its proper divisors (912147).

1520205 is a wasteful number, since it uses less digits than its factorization.

1520205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101355.

The product of its (nonzero) digits is 100, while the sum is 15.

The square root of 1520205 is about 1232.9659362691. The cubic root of 1520205 is about 114.9831103110.

Adding to 1520205 its reverse (5020251), we get a palindrome (6540456).

The spelling of 1520205 in words is "one million, five hundred twenty thousand, two hundred five".