1220734091 has 8 divisors (see below), whose sum is σ = 1263401280. Its totient is φ = 1178105152.

The previous prime is 1220734069. The next prime is 1220734127. The reversal of 1220734091 is 1904370221.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1220734091 - 2²² = 1216539787 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1220734051) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 65471 + ... + 82023.

It is an arithmetic number, because the mean of its divisors is an integer number (157925160).

Almost surely, 2^1220734091 is an apocalyptic number.

1220734091 is a deficient number, since it is larger than the sum of its proper divisors (42667189).

1220734091 is a wasteful number, since it uses less digits than its factorization.

1220734091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19125.

The product of its (nonzero) digits is 3024, while the sum is 29.

The square root of 1220734091 is about 34939.0052949422. The cubic root of 1220734091 is about 1068.7440035868.

The spelling of 1220734091 in words is "one billion, two hundred twenty million, seven hundred thirty-four thousand, ninety-one".