1258840 has 32 divisors (see below), whose sum is σ = 3090960. Its totient is φ = 457600.

The previous prime is 1258837. The next prime is 1258847. The reversal of 1258840 is 488521.

It is a plaindrome in base 16.

It is a junction number, because it is equal to n+sod(n) for n = 1258799 and 1258808.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1258847) 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, 991 + ... + 1870.

2^1258840 is an apocalyptic number.

1258840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1258840 is an abundant number, since it is smaller than the sum of its proper divisors (1832120).

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

1258840 is a wasteful number, since it uses less digits than its factorization.

1258840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2883 (or 2879 counting only the distinct ones).

The product of its (nonzero) digits is 2560, while the sum is 28.

The square root of 1258840 is about 1121.9803919855. The cubic root of 1258840 is about 107.9750742660.

The spelling of 1258840 in words is "one million, two hundred fifty-eight thousand, eight hundred forty".