1225320515 has 16 divisors (see below), whose sum is σ = 1563271488. Its totient is φ = 919940736.

The previous prime is 1225320493. The next prime is 1225320521. The reversal of 1225320515 is 5150235221.

It is a cyclic number.

It is not a de Polignac number, because 1225320515 - 2⁸ = 1225320259 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 94424 + ... + 106613.

It is an arithmetic number, because the mean of its divisors is an integer number (97704468).

Almost surely, 2^1225320515 is an apocalyptic number.

1225320515 is a deficient number, since it is larger than the sum of its proper divisors (337950973).

1225320515 is a wasteful number, since it uses less digits than its factorization.

1225320515 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 201118.

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

The square root of 1225320515 is about 35004.5784862495. The cubic root of 1225320515 is about 1070.0807913492.

Adding to 1225320515 its reverse (5150235221), we get a palindrome (6375555736).

It can be divided in two parts, 12253 and 20515, that added together give a 15-th power (32768 = 2¹⁵).

The spelling of 1225320515 in words is "one billion, two hundred twenty-five million, three hundred twenty thousand, five hundred fifteen".