1520161 has 4 divisors (see below), whose sum is σ = 1528000. Its totient is φ = 1512324.

The previous prime is 1520159. The next prime is 1520173. The reversal of 1520161 is 1610251.

It is a happy number.

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 1520161 - 2¹ = 1520159 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1520131) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3621 + ... + 4018.

It is an arithmetic number, because the mean of its divisors is an integer number (382000).

2^1520161 is an apocalyptic number.

It is an amenable number.

1520161 is a deficient number, since it is larger than the sum of its proper divisors (7839).

1520161 is an equidigital number, since it uses as much as digits as its factorization.

1520161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7838.

The product of its (nonzero) digits is 60, while the sum is 16.

The square root of 1520161 is about 1232.9480929869. The cubic root of 1520161 is about 114.9820009638.

It can be divided in two parts, 1520 and 161, that added together give a square (1681 = 41²).

The spelling of 1520161 in words is "one million, five hundred twenty thousand, one hundred sixty-one".