1225140452 has 6 divisors (see below), whose sum is σ = 2143995798. Its totient is φ = 612570224.

The previous prime is 1225140451. The next prime is 1225140481. The reversal of 1225140452 is 2540415221.

It can be written as a sum of positive squares in only one way, i.e., 1101841636 + 123298816 = 33194^2 + 11104^2 .

It is not an unprimeable number, because it can be changed into a prime (1225140451) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 153142553 + ... + 153142560.

It is an arithmetic number, because the mean of its divisors is an integer number (357332633).

Almost surely, 2^1225140452 is an apocalyptic number.

It is an amenable number.

1225140452 is a deficient number, since it is larger than the sum of its proper divisors (918855346).

1225140452 is a wasteful number, since it uses less digits than its factorization.

1225140452 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 306285117 (or 306285115 counting only the distinct ones).

The product of its (nonzero) digits is 3200, while the sum is 26.

The square root of 1225140452 is about 35002.0063996337. The cubic root of 1225140452 is about 1070.0283720313.

Adding to 1225140452 its reverse (2540415221), we get a palindrome (3765555673).

The spelling of 1225140452 in words is "one billion, two hundred twenty-five million, one hundred forty thousand, four hundred fifty-two".