1520121 has 8 divisors (see below), whose sum is σ = 2070144. Its totient is φ = 991760.

The previous prime is 1520107. The next prime is 1520131. The reversal of 1520121 is 1210251.

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

It is a cyclic number.

It is not a de Polignac number, because 1520121 - 2¹⁰ = 1519097 is a prime.

It is an Ulam number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1520097 and 1520106.

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

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5250 + ... + 5531.

It is an arithmetic number, because the mean of its divisors is an integer number (258768).

2^1520121 is an apocalyptic number.

It is an amenable number.

1520121 is a deficient number, since it is larger than the sum of its proper divisors (550023).

1520121 is a wasteful number, since it uses less digits than its factorization.

1520121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10831.

The product of its (nonzero) digits is 20, while the sum is 12.

The square root of 1520121 is about 1232.9318715971. The cubic root of 1520121 is about 114.9809924477.

Adding to 1520121 its reverse (1210251), we get a palindrome (2730372).

The spelling of 1520121 in words is "one million, five hundred twenty thousand, one hundred twenty-one".