1220786141 has 4 divisors (see below), whose sum is σ = 1237980384. Its totient is φ = 1203591900.

The previous prime is 1220786137. The next prime is 1220786173. The reversal of 1220786141 is 1416870221.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1220786141 - 2² = 1220786137 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1220786098 and 1220786107.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220786041) 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, 8597015 + ... + 8597156.

It is an arithmetic number, because the mean of its divisors is an integer number (309495096).

Almost surely, 2^1220786141 is an apocalyptic number.

It is an amenable number.

1220786141 is a deficient number, since it is larger than the sum of its proper divisors (17194243).

1220786141 is an equidigital number, since it uses as much as digits as its factorization.

1220786141 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17194242.

The product of its (nonzero) digits is 5376, while the sum is 32.

The square root of 1220786141 is about 34939.7501565194. The cubic root of 1220786141 is about 1068.7591931724.

The spelling of 1220786141 in words is "one billion, two hundred twenty million, seven hundred eighty-six thousand, one hundred forty-one".