1227210725 has 24 divisors (see below), whose sum is σ = 1640514792. Its totient is φ = 905299200.

The previous prime is 1227210697. The next prime is 1227210737. The reversal of 1227210725 is 5270127221.

It can be written as a sum of positive squares in 12 ways, for example, as 379119841 + 848090884 = 19471^2 + 29122^2 .

It is not a de Polignac number, because 1227210725 - 2²⁸ = 958775269 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 523055 + ... + 525395.

It is an arithmetic number, because the mean of its divisors is an integer number (68354783).

Almost surely, 2^1227210725 is an apocalyptic number.

It is an amenable number.

1227210725 is a deficient number, since it is larger than the sum of its proper divisors (413304067).

1227210725 is a wasteful number, since it uses less digits than its factorization.

1227210725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3977 (or 3972 counting only the distinct ones).

The product of its (nonzero) digits is 3920, while the sum is 29.

The square root of 1227210725 is about 35031.5675498542. The cubic root of 1227210725 is about 1070.6307530941.

Adding to 1227210725 its reverse (5270127221), we get a palindrome (6497337946).

It can be divided in two parts, 12272 and 10725, that multiplied together give a triangular number (131617200 = T₁₆₂₂₄).

The spelling of 1227210725 in words is "one billion, two hundred twenty-seven million, two hundred ten thousand, seven hundred twenty-five".