1520245 has 4 divisors (see below), whose sum is σ = 1824300. Its totient is φ = 1216192.

The previous prime is 1520227. The next prime is 1520251. The reversal of 1520245 is 5420251.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5420251 = 2237 ⋅2423.

It can be written as a sum of positive squares in 2 ways, for example, as 844561 + 675684 = 919^2 + 822^2 .

It is a cyclic number.

It is not a de Polignac number, because 1520245 - 2⁵ = 1520213 is a prime.

It is a super-2 number, since 2×1520245² = 4622289720050, which contains 22 as substring.

1520245 is a lucky number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 152020 + ... + 152029.

It is an arithmetic number, because the mean of its divisors is an integer number (456075).

2^1520245 is an apocalyptic number.

It is an amenable number.

1520245 is a deficient number, since it is larger than the sum of its proper divisors (304055).

1520245 is an equidigital number, since it uses as much as digits as its factorization.

1520245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 304054.

The product of its (nonzero) digits is 400, while the sum is 19.

The square root of 1520245 is about 1232.9821572107. The cubic root of 1520245 is about 114.9841187899.

Adding to 1520245 its reverse (5420251), we get a palindrome (6940496).

The spelling of 1520245 in words is "one million, five hundred twenty thousand, two hundred forty-five".