1520679 has 4 divisors (see below), whose sum is σ = 2027576. Its totient is φ = 1013784.

The previous prime is 1520653. The next prime is 1520681. The reversal of 1520679 is 9760251.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9760251 = 3 ⋅3253417.

It is not a de Polignac number, because 1520679 - 2⁸ = 1520423 is a prime.

It is a D-number.

It is a Duffinian number.

1520679 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1520639) 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 3 ways as a sum of consecutive naturals, for example, 253444 + ... + 253449.

It is an arithmetic number, because the mean of its divisors is an integer number (506894).

2^1520679 is an apocalyptic number.

1520679 is a deficient number, since it is larger than the sum of its proper divisors (506897).

1520679 is an equidigital number, since it uses as much as digits as its factorization.

1520679 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 506896.

The product of its (nonzero) digits is 3780, while the sum is 30.

The square root of 1520679 is about 1233.1581407103. The cubic root of 1520679 is about 114.9950596491.

It can be divided in two parts, 152067 and 9, that added together give a triangular number (152076 = T₅₅₁).

The spelling of 1520679 in words is "one million, five hundred twenty thousand, six hundred seventy-nine".