1220272741 has 4 divisors (see below), whose sum is σ = 1222264012. Its totient is φ = 1218281472.

The previous prime is 1220272721. The next prime is 1220272763. The reversal of 1220272741 is 1472720221.

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

It can be written as a sum of positive squares in 2 ways, for example, as 46867716 + 1173405025 = 6846^2 + 34255^2 .

It is a cyclic number.

It is not a de Polignac number, because 1220272741 - 2¹⁵ = 1220239973 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 (1220272721) 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, 994716 + ... + 995941.

It is an arithmetic number, because the mean of its divisors is an integer number (305566003).

Almost surely, 2^1220272741 is an apocalyptic number.

It is an amenable number.

1220272741 is a deficient number, since it is larger than the sum of its proper divisors (1991271).

1220272741 is an equidigital number, since it uses as much as digits as its factorization.

1220272741 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1991270.

The product of its (nonzero) digits is 3136, while the sum is 28.

The square root of 1220272741 is about 34932.4024510196. The cubic root of 1220272741 is about 1068.6093504091.

Adding to 1220272741 its reverse (1472720221), we get a palindrome (2692992962).

The spelling of 1220272741 in words is "one billion, two hundred twenty million, two hundred seventy-two thousand, seven hundred forty-one".