1225510442 has 8 divisors (see below), whose sum is σ = 1979670756. Its totient is φ = 565620192.

The previous prime is 1225510441. The next prime is 1225510499. The reversal of 1225510442 is 2440155221.

It can be written as a sum of positive squares in 2 ways, for example, as 1032272641 + 193237801 = 32129^2 + 13901^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Harshad number since it is a multiple of its sum of digits (26), and also a Moran number because the ratio is a prime number: 47135017 = 1225510442 / (1 + 2 + 2 + 5 + 5 + 1 + 0 + 4 + 4 + 2).

It is not an unprimeable number, because it can be changed into a prime (1225510441) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23567483 + ... + 23567534.

Almost surely, 2^1225510442 is an apocalyptic number.

1225510442 is a deficient number, since it is larger than the sum of its proper divisors (754160314).

1225510442 is a wasteful number, since it uses less digits than its factorization.

1225510442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47135032.

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

The square root of 1225510442 is about 35007.2912691056. The cubic root of 1225510442 is about 1070.1360766758.

Adding to 1225510442 its reverse (2440155221), we get a palindrome (3665665663).

The spelling of 1225510442 in words is "one billion, two hundred twenty-five million, five hundred ten thousand, four hundred forty-two".