1138551 has 8 divisors (see below), whose sum is σ = 1526784. Its totient is φ = 754680.

The previous prime is 1138547. The next prime is 1138559. The reversal of 1138551 is 1558311.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1138551 - 2² = 1138547 is a prime.

1138551 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1138559) 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, 421 + ... + 1566.

It is an arithmetic number, because the mean of its divisors is an integer number (190848).

2^1138551 is an apocalyptic number.

1138551 is a deficient number, since it is larger than the sum of its proper divisors (388233).

1138551 is a wasteful number, since it uses less digits than its factorization.

1138551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2181.

The product of its digits is 600, while the sum is 24.

The square root of 1138551 is about 1067.0290530253. The cubic root of 1138551 is about 104.4201140030.

The spelling of 1138551 in words is "one million, one hundred thirty-eight thousand, five hundred fifty-one".