1351220423 has 18 divisors (see below), whose sum is σ = 1595897856. Its totient is φ = 1140716808.

The previous prime is 1351220417. The next prime is 1351220441. The reversal of 1351220423 is 3240221531.

It is not a de Polignac number, because 1351220423 - 2¹⁶ = 1351154887 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1351228423) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 216890 + ... + 223032.

It is an arithmetic number, because the mean of its divisors is an integer number (88660992).

Almost surely, 2^1351220423 is an apocalyptic number.

1351220423 is a deficient number, since it is larger than the sum of its proper divisors (244677433).

1351220423 is an frugal number, since it uses more digits than its factorization.

1351220423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6291 (or 6217 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 23.

The square root of 1351220423 is about 36758.9502434441. The cubic root of 1351220423 is about 1105.5423920077.

Adding to 1351220423 its reverse (3240221531), we get a palindrome (4591441954).

The spelling of 1351220423 in words is "one billion, three hundred fifty-one million, two hundred twenty thousand, four hundred twenty-three".