1220554245 has 16 divisors (see below), whose sum is σ = 1970171712. Its totient is φ = 645200640.

The previous prime is 1220554213. The next prime is 1220554273. The reversal of 1220554245 is 5424550221.

It is not a de Polignac number, because 1220554245 - 2⁵ = 1220554213 is a prime.

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, 358351 + ... + 361740.

It is an arithmetic number, because the mean of its divisors is an integer number (123135732).

Almost surely, 2^1220554245 is an apocalyptic number.

1220554245 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1220554245 is a deficient number, since it is larger than the sum of its proper divisors (749617467).

1220554245 is a wasteful number, since it uses less digits than its factorization.

1220554245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 720212.

The product of its (nonzero) digits is 16000, while the sum is 30.

The square root of 1220554245 is about 34936.4314863439. The cubic root of 1220554245 is about 1068.6915163784.

The spelling of 1220554245 in words is "one billion, two hundred twenty million, five hundred fifty-four thousand, two hundred forty-five".