1140400225 has 18 divisors (see below), whose sum is σ = 1434452150. Its totient is φ = 899371200.

The previous prime is 1140400223. The next prime is 1140400231. The reversal of 1140400225 is 5220040411.

It can be written as a sum of positive squares in 3 ways, for example, as 199628641 + 940771584 = 14129^2 + 30672^2 .

It is not a de Polignac number, because 1140400225 - 2¹ = 1140400223 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1140400223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 121501 + ... + 130549.

Almost surely, 2^1140400225 is an apocalyptic number.

It is an amenable number.

1140400225 is a deficient number, since it is larger than the sum of its proper divisors (294051925).

1140400225 is an frugal number, since it uses more digits than its factorization.

1140400225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9201 (or 9125 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 19.

The square root of 1140400225 is about 33769.8123329106. The cubic root of 1140400225 is about 1044.7661618217.

Adding to 1140400225 its reverse (5220040411), we get a palindrome (6360440636).

The spelling of 1140400225 in words is "one billion, one hundred forty million, four hundred thousand, two hundred twenty-five".