1261139114 has 4 divisors (see below), whose sum is σ = 1891708674. Its totient is φ = 630569556.

The previous prime is 1261139069. The next prime is 1261139119. The reversal of 1261139114 is 4119311621.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 4119311621 = 67 ⋅61482263.

It can be written as a sum of positive squares in only one way, i.e., 1219755625 + 41383489 = 34925^2 + 6433^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1261139119) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 315284777 + ... + 315284780.

Almost surely, 2^1261139114 is an apocalyptic number.

1261139114 is a deficient number, since it is larger than the sum of its proper divisors (630569560).

1261139114 is an equidigital number, since it uses as much as digits as its factorization.

1261139114 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 630569559.

The product of its digits is 1296, while the sum is 29.

The square root of 1261139114 is about 35512.5205244573. The cubic root of 1261139114 is about 1080.4076861621.

The spelling of 1261139114 in words is "one billion, two hundred sixty-one million, one hundred thirty-nine thousand, one hundred fourteen".