1139427 has 16 divisors (see below), whose sum is σ = 1712160. Its totient is φ = 758160.

The previous prime is 1139423. The next prime is 1139461. The reversal of 1139427 is 7249311.

It is not a de Polignac number, because 1139427 - 2² = 1139423 is a prime.

It is a super-3 number, since 3×1139427³ = 4437933330891142449, which contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a self number, because there is not a number n which added to its sum of digits gives 1139427.

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 15 ways as a sum of consecutive naturals, for example, 1927 + ... + 2447.

It is an arithmetic number, because the mean of its divisors is an integer number (107010).

2^1139427 is an apocalyptic number.

1139427 is a deficient number, since it is larger than the sum of its proper divisors (572733).

1139427 is an frugal number, since it uses more digits than its factorization.

1139427 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 542 (or 524 counting only the distinct ones).

The product of its digits is 1512, while the sum is 27.

The square root of 1139427 is about 1067.4394596416. The cubic root of 1139427 is about 104.4468873815.

The spelling of 1139427 in words is "one million, one hundred thirty-nine thousand, four hundred twenty-seven".