1225702144 has 36 divisors (see below), whose sum is σ = 2448985896. Its totient is φ = 612257792.

The previous prime is 1225702129. The next prime is 1225702151. The reversal of 1225702144 is 4412075221.

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, 396027 + ... + 399109.

It is an arithmetic number, because the mean of its divisors is an integer number (68027386).

Almost surely, 2^1225702144 is an apocalyptic number.

It is an amenable number.

1225702144 is a deficient number, since it is larger than the sum of its proper divisors (1223283752).

1225702144 is an equidigital number, since it uses as much as digits as its factorization.

1225702144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4652 (or 4638 counting only the distinct ones).

The product of its (nonzero) digits is 4480, while the sum is 28.

The square root of 1225702144 is about 35010.0291916474. The cubic root of 1225702144 is about 1070.1918728902.

Adding to 1225702144 its reverse (4412075221), we get a palindrome (5637777365).

The spelling of 1225702144 in words is "one billion, two hundred twenty-five million, seven hundred two thousand, one hundred forty-four".