1531138 has 8 divisors (see below), whose sum is σ = 2624832. Its totient is φ = 656196.

The previous prime is 1531129. The next prime is 1531147. The reversal of 1531138 is 8311351.

It is an interprime number because it is at equal distance from previous prime (1531129) and next prime (1531147).

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 54670 + ... + 54697.

It is an arithmetic number, because the mean of its divisors is an integer number (328104).

2^1531138 is an apocalyptic number.

1531138 is a deficient number, since it is larger than the sum of its proper divisors (1093694).

1531138 is a wasteful number, since it uses less digits than its factorization.

1531138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109376.

The product of its digits is 360, while the sum is 22.

The square root of 1531138 is about 1237.3916114149. The cubic root of 1531138 is about 115.2580970623.

Adding to 1531138 its reverse (8311351), we get a palindrome (9842489).

The spelling of 1531138 in words is "one million, five hundred thirty-one thousand, one hundred thirty-eight".