1139420 has 24 divisors (see below), whose sum is σ = 2497824. Its totient is φ = 435776.

The previous prime is 1139407. The next prime is 1139423. The reversal of 1139420 is 249311.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 1139392 and 1139401.

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 7 ways as a sum of consecutive naturals, for example, 779 + ... + 1698.

It is an arithmetic number, because the mean of its divisors is an integer number (104076).

2^1139420 is an apocalyptic number.

1139420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1139420 is an abundant number, since it is smaller than the sum of its proper divisors (1358404).

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

1139420 is a wasteful number, since it uses less digits than its factorization.

1139420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2509 (or 2507 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 20.

The square root of 1139420 is about 1067.4361807621. The cubic root of 1139420 is about 104.4466734933.

The spelling of 1139420 in words is "one million, one hundred thirty-nine thousand, four hundred twenty".