1139263451 has 4 divisors (see below), whose sum is σ = 1140380304. Its totient is φ = 1138146600.

The previous prime is 1139263429. The next prime is 1139263453. The reversal of 1139263451 is 1543629311.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1139263451 - 2¹⁸ = 1139001307 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1139263453) 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, 556895 + ... + 558936.

It is an arithmetic number, because the mean of its divisors is an integer number (285095076).

Almost surely, 2^1139263451 is an apocalyptic number.

1139263451 is a deficient number, since it is larger than the sum of its proper divisors (1116853).

1139263451 is a wasteful number, since it uses less digits than its factorization.

1139263451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1116852.

The product of its digits is 19440, while the sum is 35.

The square root of 1139263451 is about 33752.9769205621. The cubic root of 1139263451 is about 1044.4188983989.

The spelling of 1139263451 in words is "one billion, one hundred thirty-nine million, two hundred sixty-three thousand, four hundred fifty-one".