1139958 has 12 divisors (see below), whose sum is σ = 2469948. Its totient is φ = 379980.

The previous prime is 1139951. The next prime is 1139959. The reversal of 1139958 is 8599311.

It is a happy number.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1139951) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 31648 + ... + 31683.

It is an arithmetic number, because the mean of its divisors is an integer number (205829).

2^1139958 is an apocalyptic number.

1139958 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

1139958 is an abundant number, since it is smaller than the sum of its proper divisors (1329990).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1139958 is a wasteful number, since it uses less digits than its factorization.

1139958 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63339 (or 63336 counting only the distinct ones).

The product of its digits is 9720, while the sum is 36.

The square root of 1139958 is about 1067.6881567199. The cubic root of 1139958 is about 104.4631097704.

It can be divided in two parts, 113995 and 8, that added together give a triangular number (114003 = T₄₇₇).

The spelling of 1139958 in words is "one million, one hundred thirty-nine thousand, nine hundred fifty-eight".