1268142361 has 4 divisors (see below), whose sum is σ = 1268213632. Its totient is φ = 1268071092.

The previous prime is 1268142313. The next prime is 1268142367. The reversal of 1268142361 is 1632418621.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 1632418621 = 61 ⋅26760961.

It is a cyclic number.

It is not a de Polignac number, because 1268142361 - 2¹³ = 1268134169 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1268142367) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15856 + ... + 52798.

It is an arithmetic number, because the mean of its divisors is an integer number (317053408).

Almost surely, 2^1268142361 is an apocalyptic number.

It is an amenable number.

1268142361 is a deficient number, since it is larger than the sum of its proper divisors (71271).

1268142361 is an equidigital number, since it uses as much as digits as its factorization.

1268142361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71270.

The product of its digits is 13824, while the sum is 34.

The square root of 1268142361 is about 35610.9865210162. The cubic root of 1268142361 is about 1082.4038707313.

The spelling of 1268142361 in words is "one billion, two hundred sixty-eight million, one hundred forty-two thousand, three hundred sixty-one".