1139547601 has 4 divisors (see below), whose sum is σ = 1166048752. Its totient is φ = 1113046452.

The previous prime is 1139547599. The next prime is 1139547611. The reversal of 1139547601 is 1067459311.

It is a happy number.

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.

It is a cyclic number.

It is not a de Polignac number, because 1139547601 - 2¹ = 1139547599 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1139547611) 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, 13250511 + ... + 13250596.

It is an arithmetic number, because the mean of its divisors is an integer number (291512188).

Almost surely, 2^1139547601 is an apocalyptic number.

It is an amenable number.

1139547601 is a deficient number, since it is larger than the sum of its proper divisors (26501151).

1139547601 is an equidigital number, since it uses as much as digits as its factorization.

1139547601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26501150.

The product of its (nonzero) digits is 22680, while the sum is 37.

The square root of 1139547601 is about 33757.1859164830. The cubic root of 1139547601 is about 1044.5057226127.

It can be divided in two parts, 11395 and 47601, that added together give a triangular number (58996 = T₃₄₃).

The spelling of 1139547601 in words is "one billion, one hundred thirty-nine million, five hundred forty-seven thousand, six hundred one".