1225427725 has 12 divisors (see below), whose sum is σ = 1520816724. Its totient is φ = 979512320.

The previous prime is 1225427669. The next prime is 1225427729. The reversal of 1225427725 is 5277245221.

It can be written as a sum of positive squares in 6 ways, for example, as 1687401 + 1223740324 = 1299^2 + 34982^2 .

It is not a de Polignac number, because 1225427725 - 2¹⁵ = 1225394957 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 (1225427729) 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, 10287 + ... + 50563.

It is an arithmetic number, because the mean of its divisors is an integer number (126734727).

Almost surely, 2^1225427725 is an apocalyptic number.

It is an amenable number.

1225427725 is a deficient number, since it is larger than the sum of its proper divisors (295388999).

1225427725 is a wasteful number, since it uses less digits than its factorization.

1225427725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41504 (or 41499 counting only the distinct ones).

The product of its digits is 78400, while the sum is 37.

The square root of 1225427725 is about 35006.1098238579. The cubic root of 1225427725 is about 1070.1119995146. Note that the first 3 decimals are identical.

The spelling of 1225427725 in words is "one billion, two hundred twenty-five million, four hundred twenty-seven thousand, seven hundred twenty-five".