1223401345 has 16 divisors (see below), whose sum is σ = 1570475088. Its totient is φ = 911646720.

The previous prime is 1223401321. The next prime is 1223401357. The reversal of 1223401345 is 5431043221.

It can be written as a sum of positive squares in 8 ways, for example, as 46362481 + 1177038864 = 6809^2 + 34308^2 .

It is not a de Polignac number, because 1223401345 - 2¹⁷ = 1223270273 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 65946 + ... + 82435.

It is an arithmetic number, because the mean of its divisors is an integer number (98154693).

Almost surely, 2^1223401345 is an apocalyptic number.

It is an amenable number.

1223401345 is a deficient number, since it is larger than the sum of its proper divisors (347073743).

1223401345 is a wasteful number, since it uses less digits than its factorization.

1223401345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 148500.

The product of its (nonzero) digits is 2880, while the sum is 25.

The square root of 1223401345 is about 34977.1546155487. The cubic root of 1223401345 is about 1069.5218246535.

Adding to 1223401345 its reverse (5431043221), we get a palindrome (6654444566).

The spelling of 1223401345 in words is "one billion, two hundred twenty-three million, four hundred one thousand, three hundred forty-five".