1231404343 has 8 divisors (see below), whose sum is σ = 1326402000. Its totient is φ = 1136445888.

The previous prime is 1231404341. The next prime is 1231404407. The reversal of 1231404343 is 3434041321.

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 1231404343 - 2¹ = 1231404341 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 (1231404341) 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, 107643 + ... + 118531.

It is an arithmetic number, because the mean of its divisors is an integer number (165800250).

Almost surely, 2^1231404343 is an apocalyptic number.

1231404343 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1231404343 is a deficient number, since it is larger than the sum of its proper divisors (94997657).

1231404343 is a wasteful number, since it uses less digits than its factorization.

1231404343 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19601.

The product of its (nonzero) digits is 3456, while the sum is 25.

The square root of 1231404343 is about 35091.3713468140. The cubic root of 1231404343 is about 1071.8488845312.

Adding to 1231404343 its reverse (3434041321), we get a palindrome (4665445664).

The spelling of 1231404343 in words is "one billion, two hundred thirty-one million, four hundred four thousand, three hundred forty-three".