1231262105 has 8 divisors (see below), whose sum is σ = 1541754432. Its totient is φ = 942183088.

The previous prime is 1231262101. The next prime is 1231262117. The reversal of 1231262105 is 5012621321.

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 1231262105 - 2² = 1231262101 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1231262101) 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, 5353199 + ... + 5353428.

It is an arithmetic number, because the mean of its divisors is an integer number (192719304).

Almost surely, 2^1231262105 is an apocalyptic number.

It is an amenable number.

1231262105 is a deficient number, since it is larger than the sum of its proper divisors (310492327).

1231262105 is a wasteful number, since it uses less digits than its factorization.

1231262105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10706655.

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 1231262105 is about 35089.3446077296. The cubic root of 1231262105 is about 1071.8076136270.

Adding to 1231262105 its reverse (5012621321), we get a palindrome (6243883426).

The spelling of 1231262105 in words is "one billion, two hundred thirty-one million, two hundred sixty-two thousand, one hundred five".