1223401601 has 4 divisors (see below), whose sum is σ = 1231612500. Its totient is φ = 1215190704.

The previous prime is 1223401567. The next prime is 1223401603. The reversal of 1223401601 is 1061043221.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1061043221 = 7 ⋅151577603.

It can be written as a sum of positive squares in 2 ways, for example, as 267355201 + 956046400 = 16351^2 + 30920^2 .

It is a cyclic number.

It is not a de Polignac number, because 1223401601 - 2³⁰ = 149659777 is a prime.

It is a super-2 number, since 2×1223401601² = 2993422954658726402, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1223401603) 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, 4105226 + ... + 4105523.

It is an arithmetic number, because the mean of its divisors is an integer number (307903125).

Almost surely, 2^1223401601 is an apocalyptic number.

It is an amenable number.

1223401601 is a deficient number, since it is larger than the sum of its proper divisors (8210899).

1223401601 is an equidigital number, since it uses as much as digits as its factorization.

1223401601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8210898.

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 1223401601 is about 34977.1582750800. The cubic root of 1223401601 is about 1069.5218992536.

Adding to 1223401601 its reverse (1061043221), we get a palindrome (2284444822).

The spelling of 1223401601 in words is "one billion, two hundred twenty-three million, four hundred one thousand, six hundred one".