1225409515 has 16 divisors (see below), whose sum is σ = 1615891680. Its totient is φ = 884696320.

The previous prime is 1225409513. The next prime is 1225409533. The reversal of 1225409515 is 5159045221.

It is not a de Polignac number, because 1225409515 - 2¹ = 1225409513 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1225409513) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 73780 + ... + 88849.

It is an arithmetic number, because the mean of its divisors is an integer number (100993230).

Almost surely, 2^1225409515 is an apocalyptic number.

1225409515 is a deficient number, since it is larger than the sum of its proper divisors (390482165).

1225409515 is a wasteful number, since it uses less digits than its factorization.

1225409515 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 162782.

The product of its (nonzero) digits is 18000, while the sum is 34.

The square root of 1225409515 is about 35005.8497254387. The cubic root of 1225409515 is about 1070.1066988250.

The spelling of 1225409515 in words is "one billion, two hundred twenty-five million, four hundred nine thousand, five hundred fifteen".