1201139 has 8 divisors (see below), whose sum is σ = 1240272. Its totient is φ = 1162720.

The previous prime is 1201117. The next prime is 1201141. The reversal of 1201139 is 9311021.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1201139 - 2⁸ = 1200883 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1201439) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6857 + ... + 7029.

It is an arithmetic number, because the mean of its divisors is an integer number (155034).

2^1201139 is an apocalyptic number.

1201139 is a deficient number, since it is larger than the sum of its proper divisors (39133).

1201139 is a wasteful number, since it uses less digits than its factorization.

1201139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 357.

The product of its (nonzero) digits is 54, while the sum is 17.

The square root of 1201139 is about 1095.9648716998. The cubic root of 1201139 is about 106.2994676228.

The spelling of 1201139 in words is "one million, two hundred one thousand, one hundred thirty-nine".