1520746 has 4 divisors (see below), whose sum is σ = 2281122. Its totient is φ = 760372.

The previous prime is 1520723. The next prime is 1520747. The reversal of 1520746 is 6470251.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 1476225 + 44521 = 1215^2 + 211^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1520746.

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 as a sum of consecutive naturals, namely, 380185 + ... + 380188.

2^1520746 is an apocalyptic number.

1520746 is a deficient number, since it is larger than the sum of its proper divisors (760376).

1520746 is an equidigital number, since it uses as much as digits as its factorization.

1520746 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 760375.

The product of its (nonzero) digits is 1680, while the sum is 25.

The square root of 1520746 is about 1233.1853064321. The cubic root of 1520746 is about 114.9967484903.

Adding to 1520746 its reverse (6470251), we get a palindrome (7990997).

The spelling of 1520746 in words is "one million, five hundred twenty thousand, seven hundred forty-six".