1520135225 has 12 divisors (see below), whose sum is σ = 2154249024. Its totient is φ = 1042378320.

The previous prime is 1520135173. The next prime is 1520135231. The reversal of 1520135225 is 5225310251.

It is not a de Polignac number, because 1520135225 - 2⁶ = 1520135161 is a prime.

It is a super-2 number, since 2×1520135225² = 4621622204571601250, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1520135194 and 1520135203.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4343069 + ... + 4343418.

It is an arithmetic number, because the mean of its divisors is an integer number (179520752).

Almost surely, 2^1520135225 is an apocalyptic number.

It is an amenable number.

1520135225 is a deficient number, since it is larger than the sum of its proper divisors (634113799).

1520135225 is an equidigital number, since it uses as much as digits as its factorization.

1520135225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8686504 (or 8686499 counting only the distinct ones).

The product of its (nonzero) digits is 3000, while the sum is 26.

The square root of 1520135225 is about 38988.9115647000. The cubic root of 1520135225 is about 1149.8135110326.

Adding to 1520135225 its reverse (5225310251), we get a palindrome (6745445476).

The spelling of 1520135225 in words is "one billion, five hundred twenty million, one hundred thirty-five thousand, two hundred twenty-five".