1520745 has 8 divisors (see below), whose sum is σ = 2433216. Its totient is φ = 811056.

The previous prime is 1520723. The next prime is 1520747. The reversal of 1520745 is 5470251.

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

It is not a de Polignac number, because 1520745 - 2⁶ = 1520681 is a prime.

It is a Smith number, since the sum of its digits (24) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (1520747) 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, 50677 + ... + 50706.

It is an arithmetic number, because the mean of its divisors is an integer number (304152).

2^1520745 is an apocalyptic number.

1520745 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1520745 is a deficient number, since it is larger than the sum of its proper divisors (912471).

1520745 is a wasteful number, since it uses less digits than its factorization.

1520745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101391.

The product of its (nonzero) digits is 1400, while the sum is 24.

The square root of 1520745 is about 1233.1849009780. The cubic root of 1520745 is about 114.9967232841.

Adding to 1520745 its reverse (5470251), we get a palindrome (6990996).

The spelling of 1520745 in words is "one million, five hundred twenty thousand, seven hundred forty-five".