1220440125 has 32 divisors (see below), whose sum is σ = 2037619584. Its totient is φ = 648720000.

The previous prime is 1220440093. The next prime is 1220440127. The reversal of 1220440125 is 5210440221.

It is not a de Polignac number, because 1220440125 - 2⁵ = 1220440093 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220440127) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 109825 + ... + 120425.

It is an arithmetic number, because the mean of its divisors is an integer number (63675612).

Almost surely, 2^1220440125 is an apocalyptic number.

1220440125 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1220440125 is a deficient number, since it is larger than the sum of its proper divisors (817179459).

1220440125 is a wasteful number, since it uses less digits than its factorization.

1220440125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10926 (or 10916 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 21.

The square root of 1220440125 is about 34934.7981960681. The cubic root of 1220440125 is about 1068.6582083198.

Adding to 1220440125 its reverse (5210440221), we get a palindrome (6430880346).

The spelling of 1220440125 in words is "one billion, two hundred twenty million, four hundred forty thousand, one hundred twenty-five".