245011540 has 24 divisors (see below), whose sum is σ = 514893960. Its totient is φ = 97934208.

The previous prime is 245011513. The next prime is 245011561. The reversal of 245011540 is 45110542.

It can be written as a sum of positive squares in 4 ways, for example, as 11410884 + 233600656 = 3378^2 + 15284^2 .

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 31126 + ... + 38194.

It is an arithmetic number, because the mean of its divisors is an integer number (21453915).

Almost surely, 2^245011540 is an apocalyptic number.

245011540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

245011540 is an abundant number, since it is smaller than the sum of its proper divisors (269882420).

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

245011540 is a wasteful number, since it uses less digits than its factorization.

245011540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8811 (or 8809 counting only the distinct ones).

The product of its (nonzero) digits is 800, while the sum is 22.

The square root of 245011540 is about 15652.8444699358. The cubic root of 245011540 is about 625.7422988389.

The spelling of 245011540 in words is "two hundred forty-five million, eleven thousand, five hundred forty".