1258851380 has 48 divisors (see below), whose sum is σ = 2669009616. Its totient is φ = 498723840.

The previous prime is 1258851329. The next prime is 1258851397. The reversal of 1258851380 is 831588521.

It can be written as a sum of positive squares in 8 ways, for example, as 642521104 + 616330276 = 25348^2 + 24826^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1146992 + ... + 1148088.

It is an arithmetic number, because the mean of its divisors is an integer number (55604367).

Almost surely, 2^1258851380 is an apocalyptic number.

1258851380 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1258851380 is an abundant number, since it is smaller than the sum of its proper divisors (1410158236).

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

1258851380 is a wasteful number, since it uses less digits than its factorization.

1258851380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1604 (or 1602 counting only the distinct ones).

The product of its (nonzero) digits is 76800, while the sum is 41.

The square root of 1258851380 is about 35480.2956582946. The cubic root of 1258851380 is about 1079.7539963241.

The spelling of 1258851380 in words is "one billion, two hundred fifty-eight million, eight hundred fifty-one thousand, three hundred eighty".