1138455 has 24 divisors (see below), whose sum is σ = 2048592. Its totient is φ = 606528.

The previous prime is 1138451. The next prime is 1138457. The reversal of 1138455 is 5548311.

It is not a de Polignac number, because 1138455 - 2² = 1138451 is a prime.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1138451) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 747 + ... + 1683.

It is an arithmetic number, because the mean of its divisors is an integer number (85358).

2^1138455 is an apocalyptic number.

1138455 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1138455 is a deficient number, since it is larger than the sum of its proper divisors (910137).

1138455 is an frugal number, since it uses more digits than its factorization.

1138455 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 957 (or 945 counting only the distinct ones).

The product of its digits is 2400, while the sum is 27.

The square root of 1138455 is about 1066.9840673600. The cubic root of 1138455 is about 104.4171790993.

The spelling of 1138455 in words is "one million, one hundred thirty-eight thousand, four hundred fifty-five".