1258138 has 8 divisors (see below), whose sum is σ = 2156832. Its totient is φ = 539196.

The previous prime is 1258133. The next prime is 1258139. The reversal of 1258138 is 8318521.

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

It is a super-2 number, since 2×1258138² = 3165822454088, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1258133) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 44920 + ... + 44947.

It is an arithmetic number, because the mean of its divisors is an integer number (269604).

2^1258138 is an apocalyptic number.

1258138 is a deficient number, since it is larger than the sum of its proper divisors (898694).

1258138 is an equidigital number, since it uses as much as digits as its factorization.

1258138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89876.

The product of its digits is 1920, while the sum is 28.

The square root of 1258138 is about 1121.6675086673. The cubic root of 1258138 is about 107.9549995421.

The spelling of 1258138 in words is "one million, two hundred fifty-eight thousand, one hundred thirty-eight".