1011439 has 12 divisors (see below), whose sum is σ = 1199128. Its totient is φ = 847440.

The previous prime is 1011431. The next prime is 1011443. The reversal of 1011439 is 9341101.

It is a happy number.

It is not a de Polignac number, because 1011439 - 2³ = 1011431 is a prime.

It is a hoax number, since the sum of its digits (19) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1011431) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1252 + ... + 1894.

2^1011439 is an apocalyptic number.

1011439 is a deficient number, since it is larger than the sum of its proper divisors (187689).

1011439 is a wasteful number, since it uses less digits than its factorization.

1011439 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 678 (or 667 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 19.

The square root of 1011439 is about 1005.7032365464. The cubic root of 1011439 is about 100.3798552727.

It can be divided in two parts, 10114 and 39, that added together give a triangular number (10153 = T₁₄₂).

The spelling of 1011439 in words is "one million, eleven thousand, four hundred thirty-nine".