40542061 has 6 divisors (see below), whose sum is σ = 47161230. Its totient is φ = 34750296.

The previous prime is 40542049. The next prime is 40542091. The reversal of 40542061 is 16024504.

It can be written as a sum of positive squares in only one way, i.e., 30969225 + 9572836 = 5565^2 + 3094^2 .

It is not a de Polignac number, because 40542061 - 2¹³ = 40533869 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40542001) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 413646 + ... + 413743.

It is an arithmetic number, because the mean of its divisors is an integer number (7860205).

Almost surely, 2^40542061 is an apocalyptic number.

It is an amenable number.

40542061 is a deficient number, since it is larger than the sum of its proper divisors (6619169).

40542061 is an equidigital number, since it uses as much as digits as its factorization.

40542061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 827403 (or 827396 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 22.

The square root of 40542061 is about 6367.2647973836. The cubic root of 40542061 is about 343.5331151549.

Adding to 40542061 its reverse (16024504), we get a palindrome (56566565).

The spelling of 40542061 in words is "forty million, five hundred forty-two thousand, sixty-one".