1258434140 has 12 divisors (see below), whose sum is σ = 2642711736. Its totient is φ = 503373648.

The previous prime is 1258434139. The next prime is 1258434143. The reversal of 1258434140 is 414348521.

It is a junction number, because it is equal to n+sod(n) for n = 1258434097 and 1258434106.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1258434143) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31460834 + ... + 31460873.

It is an arithmetic number, because the mean of its divisors is an integer number (220225978).

Almost surely, 2^1258434140 is an apocalyptic number.

1258434140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1258434140 is an abundant number, since it is smaller than the sum of its proper divisors (1384277596).

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

1258434140 is a wasteful number, since it uses less digits than its factorization.

1258434140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62921716 (or 62921714 counting only the distinct ones).

The product of its (nonzero) digits is 15360, while the sum is 32.

The square root of 1258434140 is about 35474.4152876408. The cubic root of 1258434140 is about 1079.6346901196.

The spelling of 1258434140 in words is "one billion, two hundred fifty-eight million, four hundred thirty-four thousand, one hundred forty".