1220540245 has 16 divisors (see below), whose sum is σ = 1553698368. Its totient is φ = 917280000.

The previous prime is 1220540179. The next prime is 1220540291. The reversal of 1220540245 is 5420450221.

It is not a de Polignac number, because 1220540245 - 2¹¹ = 1220538197 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 33370 + ... + 59620.

It is an arithmetic number, because the mean of its divisors is an integer number (97106148).

Almost surely, 2^1220540245 is an apocalyptic number.

It is an amenable number.

1220540245 is a deficient number, since it is larger than the sum of its proper divisors (333158123).

1220540245 is a wasteful number, since it uses less digits than its factorization.

1220540245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26820.

The product of its (nonzero) digits is 3200, while the sum is 25.

The square root of 1220540245 is about 34936.2311218597. The cubic root of 1220540245 is about 1068.6874303280.

Adding to 1220540245 its reverse (5420450221), we get a palindrome (6640990466).

The spelling of 1220540245 in words is "one billion, two hundred twenty million, five hundred forty thousand, two hundred forty-five".