1225540535 has 4 divisors (see below), whose sum is σ = 1470648648. Its totient is φ = 980432424.

The previous prime is 1225540531. The next prime is 1225540541. The reversal of 1225540535 is 5350455221.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1225540535 - 2² = 1225540531 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1225540531) 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, 122554049 + ... + 122554058.

It is an arithmetic number, because the mean of its divisors is an integer number (367662162).

Almost surely, 2^1225540535 is an apocalyptic number.

1225540535 is a deficient number, since it is larger than the sum of its proper divisors (245108113).

1225540535 is an equidigital number, since it uses as much as digits as its factorization.

1225540535 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 245108112.

The product of its (nonzero) digits is 30000, while the sum is 32.

The square root of 1225540535 is about 35007.7210769282. The cubic root of 1225540535 is about 1070.1448358399.

Adding to 1225540535 its reverse (5350455221), we get a palindrome (6575995756).

The spelling of 1225540535 in words is "one billion, two hundred twenty-five million, five hundred forty thousand, five hundred thirty-five".