1139478 has 8 divisors (see below), whose sum is σ = 2278968. Its totient is φ = 379824.

The previous prime is 1139473. The next prime is 1139483. The reversal of 1139478 is 8749311.

It is an interprime number because it is at equal distance from previous prime (1139473) and next prime (1139483).

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

1139478 is an admirable number.

It is a super-2 number, since 2×1139478² = 2596820224968, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1139471) 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, 94951 + ... + 94962.

It is an arithmetic number, because the mean of its divisors is an integer number (284871).

2^1139478 is an apocalyptic number.

1139478 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

1139478 is a wasteful number, since it uses less digits than its factorization.

1139478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 189918.

The product of its digits is 6048, while the sum is 33.

The square root of 1139478 is about 1067.4633483169. The cubic root of 1139478 is about 104.4484456828.

It can be divided in two parts, 113 and 9478, that added together give a triangular number (9591 = T₁₃₈).

The spelling of 1139478 in words is "one million, one hundred thirty-nine thousand, four hundred seventy-eight".