1540542 has 8 divisors (see below), whose sum is σ = 3081096. Its totient is φ = 513512.

The previous prime is 1540541. The next prime is 1540543. The reversal of 1540542 is 2450451.

It is an interprime number because it is at equal distance from previous prime (1540541) and next prime (1540543).

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

1540542 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1540541) 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, 128373 + ... + 128384.

It is an arithmetic number, because the mean of its divisors is an integer number (385137).

2^1540542 is an apocalyptic number.

1540542 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

1540542 is a wasteful number, since it uses less digits than its factorization.

1540542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 256762.

The product of its (nonzero) digits is 800, while the sum is 21.

The square root of 1540542 is about 1241.1857234113. The cubic root of 1540542 is about 115.4935810979.

Adding to 1540542 its reverse (2450451), we get a palindrome (3990993).

Subtracting 1540542 from its reverse (2450451), we obtain a palindrome (909909).

The spelling of 1540542 in words is "one million, five hundred forty thousand, five hundred forty-two".