1258140 has 48 divisors (see below), whose sum is σ = 3796128. Its totient is φ = 309504.

The previous prime is 1258139. The next prime is 1258141. The reversal of 1258140 is 418521.

It is an interprime number because it is at equal distance from previous prime (1258139) and next prime (1258141).

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1258141) 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, 27 + ... + 1586.

It is an arithmetic number, because the mean of its divisors is an integer number (79086).

2^1258140 is an apocalyptic number.

1258140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1258140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1898064).

1258140 is an abundant number, since it is smaller than the sum of its proper divisors (2537988).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1258140 is a wasteful number, since it uses less digits than its factorization.

1258140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1638 (or 1636 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 21.

The square root of 1258140 is about 1121.6684001968. The cubic root of 1258140 is about 107.9550567457.

It can be divided in two parts, 12581 and 40, that added together give a palindrome (12621).

The spelling of 1258140 in words is "one million, two hundred fifty-eight thousand, one hundred forty".