1142520078 has 64 divisors (see below), whose sum is σ = 2734497792. Its totient is φ = 311155680.

The previous prime is 1142520059. The next prime is 1142520079. The reversal of 1142520078 is 8700252411.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1142520079) 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 31 ways as a sum of consecutive naturals, for example, 298525 + ... + 302327.

It is an arithmetic number, because the mean of its divisors is an integer number (42726528).

Almost surely, 2^1142520078 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1142520078, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1367248896).

1142520078 is an abundant number, since it is smaller than the sum of its proper divisors (1591977714).

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

1142520078 is a wasteful number, since it uses less digits than its factorization.

1142520078 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4149.

The product of its (nonzero) digits is 4480, while the sum is 30.

The square root of 1142520078 is about 33801.1845650415. The cubic root of 1142520078 is about 1045.4131217632.

Adding to 1142520078 its reverse (8700252411), we get a palindrome (9842772489).

The spelling of 1142520078 in words is "one billion, one hundred forty-two million, five hundred twenty thousand, seventy-eight".