1225043505 has 24 divisors (see below), whose sum is σ = 2426753472. Its totient is φ = 560019744.

The previous prime is 1225043497. The next prime is 1225043507. The reversal of 1225043505 is 5053405221.

It is a happy number.

1225043505 is a `hidden beast` number, since 1 + 225 + 0 + 435 + 0 + 5 = 666.

It is not a de Polignac number, because 1225043505 - 2³ = 1225043497 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1225043507) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1944199 + ... + 1944828.

It is an arithmetic number, because the mean of its divisors is an integer number (101114728).

Almost surely, 2^1225043505 is an apocalyptic number.

1225043505 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1225043505 is a deficient number, since it is larger than the sum of its proper divisors (1201709967).

1225043505 is a wasteful number, since it uses less digits than its factorization.

1225043505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3889045 (or 3889042 counting only the distinct ones).

The product of its (nonzero) digits is 6000, while the sum is 27.

The square root of 1225043505 is about 35000.6214944821. The cubic root of 1225043505 is about 1070.0001470288. Note that the first 3 decimals are identical.

Adding to 1225043505 its reverse (5053405221), we get a palindrome (6278448726).

It can be divided in two parts, 12250 and 43505, that added together give a palindrome (55755).

The spelling of 1225043505 in words is "one billion, two hundred twenty-five million, forty-three thousand, five hundred five".