1540142 has 8 divisors (see below), whose sum is σ = 2384832. Its totient is φ = 745200.

The previous prime is 1540141. The next prime is 1540151. The reversal of 1540142 is 2410451.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 1540142.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1540141) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12359 + ... + 12482.

It is an arithmetic number, because the mean of its divisors is an integer number (298104).

2^1540142 is an apocalyptic number.

1540142 is a deficient number, since it is larger than the sum of its proper divisors (844690).

1540142 is a wasteful number, since it uses less digits than its factorization.

1540142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24874.

The product of its (nonzero) digits is 160, while the sum is 17.

The square root of 1540142 is about 1241.0245767107. The cubic root of 1540142 is about 115.4835843064.

Adding to 1540142 its reverse (2410451), we get a palindrome (3950593).

The spelling of 1540142 in words is "one million, five hundred forty thousand, one hundred forty-two".