1228940725 has 12 divisors (see below), whose sum is σ = 1556311104. Its totient is φ = 962233520.

The previous prime is 1228940723. The next prime is 1228940749. The reversal of 1228940725 is 5270498221.

It is not a de Polignac number, because 1228940725 - 2¹ = 1228940723 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1228940723) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 521779 + ... + 524128.

It is an arithmetic number, because the mean of its divisors is an integer number (129692592).

Almost surely, 2^1228940725 is an apocalyptic number.

It is an amenable number.

1228940725 is a deficient number, since it is larger than the sum of its proper divisors (327370379).

1228940725 is a wasteful number, since it uses less digits than its factorization.

1228940725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1045964 (or 1045959 counting only the distinct ones).

The product of its (nonzero) digits is 80640, while the sum is 40.

The square root of 1228940725 is about 35056.2508691389. The cubic root of 1228940725 is about 1071.1336065707.

The spelling of 1228940725 in words is "one billion, two hundred twenty-eight million, nine hundred forty thousand, seven hundred twenty-five".