1540042 has 16 divisors (see below), whose sum is σ = 2705472. Its totient is φ = 643680.

The previous prime is 1540039. The next prime is 1540073. The reversal of 1540042 is 2400451.

It is a junction number, because it is equal to n+sod(n) for n = 1539998 and 1540025.

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, 768 + ... + 1915.

It is an arithmetic number, because the mean of its divisors is an integer number (169092).

2^1540042 is an apocalyptic number.

1540042 is a deficient number, since it is larger than the sum of its proper divisors (1165430).

1540042 is a wasteful number, since it uses less digits than its factorization.

1540042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2733.

The product of its (nonzero) digits is 160, while the sum is 16.

The square root of 1540042 is about 1240.9842867660. The cubic root of 1540042 is about 115.4810848381.

Adding to 1540042 its reverse (2400451), we get a palindrome (3940493).

The spelling of 1540042 in words is "one million, five hundred forty thousand, forty-two".