1230126571 has 8 divisors (see below), whose sum is σ = 1246724784. Its totient is φ = 1213615200.

The previous prime is 1230126563. The next prime is 1230126581. The reversal of 1230126571 is 1756210321.

It is a happy number.

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 1230126571 - 2³ = 1230126563 is a prime.

It is a super-2 number, since 2×1230126571² = 3026422761360436082, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1230126581) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7065 + ... + 50101.

It is an arithmetic number, because the mean of its divisors is an integer number (155840598).

Almost surely, 2^1230126571 is an apocalyptic number.

1230126571 is a deficient number, since it is larger than the sum of its proper divisors (16598213).

1230126571 is a wasteful number, since it uses less digits than its factorization.

1230126571 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43421.

The product of its (nonzero) digits is 2520, while the sum is 28.

The square root of 1230126571 is about 35073.1602653653. The cubic root of 1230126571 is about 1071.4780200272.

Adding to 1230126571 its reverse (1756210321), we get a palindrome (2986336892).

The spelling of 1230126571 in words is "one billion, two hundred thirty million, one hundred twenty-six thousand, five hundred seventy-one".