1225624465 has 8 divisors (see below), whose sum is σ = 1583884008. Its totient is φ = 905076480.

The previous prime is 1225624459. The next prime is 1225624481. The reversal of 1225624465 is 5644265221.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 39992976 + 1185631489 = 6324^2 + 34433^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1225624465 - 2³ = 1225624457 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 (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9427816 + ... + 9427945.

It is an arithmetic number, because the mean of its divisors is an integer number (197985501).

Almost surely, 2^1225624465 is an apocalyptic number.

It is an amenable number.

1225624465 is a deficient number, since it is larger than the sum of its proper divisors (358259543).

1225624465 is a wasteful number, since it uses less digits than its factorization.

1225624465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18855779.

The product of its digits is 115200, while the sum is 37.

The square root of 1225624465 is about 35008.9197919616. The cubic root of 1225624465 is about 1070.1692645725.

Adding to 1225624465 its reverse (5644265221), we get a palindrome (6869889686).

The spelling of 1225624465 in words is "one billion, two hundred twenty-five million, six hundred twenty-four thousand, four hundred sixty-five".