1225125406 has 32 divisors (see below), whose sum is σ = 1980702720. Its totient is φ = 566930496.

The previous prime is 1225125397. The next prime is 1225125409. The reversal of 1225125406 is 6045215221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1225125409) 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, 189235 + ... + 195601.

It is an arithmetic number, because the mean of its divisors is an integer number (61896960).

Almost surely, 2^1225125406 is an apocalyptic number.

1225125406 is a deficient number, since it is larger than the sum of its proper divisors (755577314).

1225125406 is a wasteful number, since it uses less digits than its factorization.

1225125406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6528.

The product of its (nonzero) digits is 4800, while the sum is 28.

The square root of 1225125406 is about 35001.7914684377. The cubic root of 1225125406 is about 1070.0239916593.

The spelling of 1225125406 in words is "one billion, two hundred twenty-five million, one hundred twenty-five thousand, four hundred six".