1245152040 has 128 divisors (see below), whose sum is σ = 4102686720. Its totient is φ = 299808000.

The previous prime is 1245152039. The next prime is 1245152071. The reversal of 1245152040 is 402515421.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 1245152040.

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 31 ways as a sum of consecutive naturals, for example, 196197 + ... + 202443.

It is an arithmetic number, because the mean of its divisors is an integer number (32052240).

Almost surely, 2^1245152040 is an apocalyptic number.

1245152040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1245152040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2051343360).

1245152040 is an abundant number, since it is smaller than the sum of its proper divisors (2857534680).

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

1245152040 is a wasteful number, since it uses less digits than its factorization.

1245152040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6423 (or 6419 counting only the distinct ones).

The product of its (nonzero) digits is 1600, while the sum is 24.

The square root of 1245152040 is about 35286.7119465671. The cubic root of 1245152040 is about 1075.8229256755.

Adding to 1245152040 its reverse (402515421), we get a palindrome (1647667461).

The spelling of 1245152040 in words is "one billion, two hundred forty-five million, one hundred fifty-two thousand, forty".