1520741 has 4 divisors (see below), whose sum is σ = 1600800. Its totient is φ = 1440684.

The previous prime is 1520723. The next prime is 1520747. The reversal of 1520741 is 1470251.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1520741 - 2¹⁸ = 1258597 is a prime.

It is a Duffinian number.

It is a congruent 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 3 ways as a sum of consecutive naturals, for example, 40001 + ... + 40038.

It is an arithmetic number, because the mean of its divisors is an integer number (400200).

2^1520741 is an apocalyptic number.

It is an amenable number.

1520741 is a deficient number, since it is larger than the sum of its proper divisors (80059).

1520741 is an equidigital number, since it uses as much as digits as its factorization.

1520741 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80058.

The product of its (nonzero) digits is 280, while the sum is 20.

The square root of 1520741 is about 1233.1832791601. The cubic root of 1520741 is about 114.9966224591.

Adding to 1520741 its reverse (1470251), we get a palindrome (2990992).

The spelling of 1520741 in words is "one million, five hundred twenty thousand, seven hundred forty-one".