1225250506 has 4 divisors (see below), whose sum is σ = 1837875762. Its totient is φ = 612625252.

The previous prime is 1225250501. The next prime is 1225250539. The reversal of 1225250506 is 6050525221.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 6050525221 = 13 ⋅465425017.

It can be written as a sum of positive squares in only one way, i.e., 850247281 + 375003225 = 29159^2 + 19365^2 .

It is not an unprimeable number, because it can be changed into a prime (1225250501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 306312625 + ... + 306312628.

Almost surely, 2^1225250506 is an apocalyptic number.

1225250506 is a deficient number, since it is larger than the sum of its proper divisors (612625256).

1225250506 is an equidigital number, since it uses as much as digits as its factorization.

1225250506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 612625255.

The product of its (nonzero) digits is 6000, while the sum is 28.

The square root of 1225250506 is about 35003.5784742075. The cubic root of 1225250506 is about 1070.0604111814.

Adding to 1225250506 its reverse (6050525221), we get a palindrome (7275775727).

The spelling of 1225250506 in words is "one billion, two hundred twenty-five million, two hundred fifty thousand, five hundred six".