1258165040 has 40 divisors (see below), whose sum is σ = 3191166288. Its totient is φ = 457514240.

The previous prime is 1258165031. The next prime is 1258165049. The reversal of 1258165040 is 405618521.

It is an interprime number because it is at equal distance from previous prime (1258165031) and next prime (1258165049).

It is a tau number, because it is divible by the number of its divisors (40).

It is a junction number, because it is equal to n+sod(n) for n = 1258164988 and 1258165006.

It is not an unprimeable number, because it can be changed into a prime (1258165049) 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, 713987 + ... + 715746.

Almost surely, 2^1258165040 is an apocalyptic number.

1258165040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1258165040 is an abundant number, since it is smaller than the sum of its proper divisors (1933001248).

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

1258165040 is a wasteful number, since it uses less digits than its factorization.

1258165040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1429757 (or 1429751 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 32.

The square root of 1258165040 is about 35470.6222104998. The cubic root of 1258165040 is about 1079.5577292900.

The spelling of 1258165040 in words is "one billion, two hundred fifty-eight million, one hundred sixty-five thousand, forty".