1225624405 has 16 divisors (see below), whose sum is σ = 1527517440. Its totient is φ = 943362112.

The previous prime is 1225624373. The next prime is 1225624409. The reversal of 1225624405 is 5044265221.

It is a cyclic number.

It is not a de Polignac number, because 1225624405 - 2⁵ = 1225624373 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1225624409) 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, 30334 + ... + 58063.

It is an arithmetic number, because the mean of its divisors is an integer number (95469840).

Almost surely, 2^1225624405 is an apocalyptic number.

It is an amenable number.

1225624405 is a deficient number, since it is larger than the sum of its proper divisors (301893035).

1225624405 is an equidigital number, since it uses as much as digits as its factorization.

1225624405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88508.

The product of its (nonzero) digits is 19200, while the sum is 31.

The square root of 1225624405 is about 35008.9189350371. The cubic root of 1225624405 is about 1070.1692471092.

Adding to 1225624405 its reverse (5044265221), we get a palindrome (6269889626).

The spelling of 1225624405 in words is "one billion, two hundred twenty-five million, six hundred twenty-four thousand, four hundred five".