1285073240 has 48 divisors (see below), whose sum is σ = 3178178640. Its totient is φ = 467297600.

The previous prime is 1285073221. The next prime is 1285073243. The reversal of 1285073240 is 423705821.

It is a junction number, because it is equal to n+sod(n) for n = 1285073197 and 1285073206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1285073243) 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 11 ways as a sum of consecutive naturals, for example, 127916 + ... + 137595.

It is an arithmetic number, because the mean of its divisors is an integer number (66212055).

Almost surely, 2^1285073240 is an apocalyptic number.

1285073240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1285073240 is an abundant number, since it is smaller than the sum of its proper divisors (1893105400).

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

1285073240 is a wasteful number, since it uses less digits than its factorization.

1285073240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 265544 (or 265529 counting only the distinct ones).

The product of its (nonzero) digits is 13440, while the sum is 32.

The square root of 1285073240 is about 35847.9182101276. The cubic root of 1285073240 is about 1087.1996235634.

The spelling of 1285073240 in words is "one billion, two hundred eighty-five million, seventy-three thousand, two hundred forty".