1220045423 has 8 divisors (see below), whose sum is σ = 1301852400. Its totient is φ = 1139997888.

The previous prime is 1220045371. The next prime is 1220045429. The reversal of 1220045423 is 3245400221.

It is a happy number.

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 1220045423 - 2¹² = 1220041327 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 (1220045429) 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, 438428 + ... + 441201.

It is an arithmetic number, because the mean of its divisors is an integer number (162731550).

Almost surely, 2^1220045423 is an apocalyptic number.

1220045423 is a deficient number, since it is larger than the sum of its proper divisors (81806977).

1220045423 is an equidigital number, since it uses as much as digits as its factorization.

1220045423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 879721.

The product of its (nonzero) digits is 1920, while the sum is 23.

The square root of 1220045423 is about 34929.1486154472. The cubic root of 1220045423 is about 1068.5429911389.

Adding to 1220045423 its reverse (3245400221), we get a palindrome (4465445644).

The spelling of 1220045423 in words is "one billion, two hundred twenty million, forty-five thousand, four hundred twenty-three".