1225493619 has 16 divisors (see below), whose sum is σ = 1868750592. Its totient is φ = 699782688.

The previous prime is 1225493617. The next prime is 1225493669. The reversal of 1225493619 is 9163945221.

1225493619 = 91² + 92² + ... + 1543².

It is not a de Polignac number, because 1225493619 - 2¹ = 1225493617 is a prime.

It is a super-2 number, since 2×1225493619² = 3003669220419434322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1225493611) 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, 10432 + ... + 50594.

It is an arithmetic number, because the mean of its divisors is an integer number (116796912).

Almost surely, 2^1225493619 is an apocalyptic number.

1225493619 is a deficient number, since it is larger than the sum of its proper divisors (643256973).

1225493619 is a wasteful number, since it uses less digits than its factorization.

1225493619 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41626.

The product of its digits is 116640, while the sum is 42.

The square root of 1225493619 is about 35007.0509897649. The cubic root of 1225493619 is about 1070.1311799457.

The spelling of 1225493619 in words is "one billion, two hundred twenty-five million, four hundred ninety-three thousand, six hundred nineteen".