1142540125 has 8 divisors (see below), whose sum is σ = 1425890232. Its totient is φ = 914032000.

The previous prime is 1142540101. The next prime is 1142540159. The reversal of 1142540125 is 5210452411.

It can be written as a sum of positive squares in 4 ways, for example, as 63154809 + 1079385316 = 7947^2 + 32854^2 .

It is not a de Polignac number, because 1142540125 - 2⁵ = 1142540093 is a prime.

It is a hoax number, since the sum of its digits (25) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1142540125.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4570036 + ... + 4570285.

It is an arithmetic number, because the mean of its divisors is an integer number (178236279).

Almost surely, 2^1142540125 is an apocalyptic number.

It is an amenable number.

1142540125 is a deficient number, since it is larger than the sum of its proper divisors (283350107).

1142540125 is an frugal number, since it uses more digits than its factorization.

1142540125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9140336 (or 9140326 counting only the distinct ones).

The product of its (nonzero) digits is 1600, while the sum is 25.

The square root of 1142540125 is about 33801.4811066024. The cubic root of 1142540125 is about 1045.4192361048.

Adding to 1142540125 its reverse (5210452411), we get a palindrome (6352992536).

The spelling of 1142540125 in words is "one billion, one hundred forty-two million, five hundred forty thousand, one hundred twenty-five".