1225163120 has 20 divisors (see below), whose sum is σ = 2848504440. Its totient is φ = 490065216.

The previous prime is 1225163119. The next prime is 1225163131. The reversal of 1225163120 is 213615221.

It is a tau number, because it is divible by the number of its divisors (20).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7657190 + ... + 7657349.

It is an arithmetic number, because the mean of its divisors is an integer number (142425222).

Almost surely, 2^1225163120 is an apocalyptic number.

1225163120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1225163120 is an abundant number, since it is smaller than the sum of its proper divisors (1623341320).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1225163120 is a wasteful number, since it uses less digits than its factorization.

1225163120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15314552 (or 15314546 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 1225163120 is about 35002.3302081447. The cubic root of 1225163120 is about 1070.0349713437.

Adding to 1225163120 its reverse (213615221), we get a palindrome (1438778341).

The spelling of 1225163120 in words is "one billion, two hundred twenty-five million, one hundred sixty-three thousand, one hundred twenty".