1243101431 has 16 divisors (see below), whose sum is σ = 1465460640. Its totient is φ = 1039566720.

The previous prime is 1243101413. The next prime is 1243101439. The reversal of 1243101431 is 1341013421.

It is a cyclic number.

It is not a de Polignac number, because 1243101431 - 2¹⁴ = 1243085047 is a prime.

It is a super-2 number, since 2×1243101431² = 3090602335508495522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1243101439) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27065 + ... + 56733.

It is an arithmetic number, because the mean of its divisors is an integer number (91591290).

Almost surely, 2^1243101431 is an apocalyptic number.

1243101431 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1243101431 is a deficient number, since it is larger than the sum of its proper divisors (222359209).

1243101431 is a wasteful number, since it uses less digits than its factorization.

1243101431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29986.

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 1243101431 is about 35257.6435826333. The cubic root of 1243101431 is about 1075.2320194342.

Adding to 1243101431 its reverse (1341013421), we get a palindrome (2584114852).

The spelling of 1243101431 in words is "one billion, two hundred forty-three million, one hundred one thousand, four hundred thirty-one".