1139429 has 4 divisors (see below), whose sum is σ = 1147884. Its totient is φ = 1130976.

The previous prime is 1139423. The next prime is 1139461. The reversal of 1139429 is 9249311.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9249311 = 1277 ⋅7243.

It can be written as a sum of positive squares in 2 ways, for example, as 954529 + 184900 = 977^2 + 430^2 .

It is a cyclic number.

It is not a de Polignac number, because 1139429 - 2¹² = 1135333 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1139423) 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, 4022 + ... + 4295.

It is an arithmetic number, because the mean of its divisors is an integer number (286971).

2^1139429 is an apocalyptic number.

It is an amenable number.

1139429 is a deficient number, since it is larger than the sum of its proper divisors (8455).

1139429 is an equidigital number, since it uses as much as digits as its factorization.

1139429 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8454.

The product of its digits is 1944, while the sum is 29.

The square root of 1139429 is about 1067.4403964625. The cubic root of 1139429 is about 104.4469484922.

The spelling of 1139429 in words is "one million, one hundred thirty-nine thousand, four hundred twenty-nine".