1540541 has 2 divisors, whose sum is σ = 1540542. Its totient is φ = 1540540.

The previous prime is 1540499. The next prime is 1540543. The reversal of 1540541 is 1450451.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1144900 + 395641 = 1070^2 + 629^2 .

It is a cyclic number.

It is not a de Polignac number, because 1540541 - 2⁶ = 1540477 is a prime.

It is a Sophie Germain prime.

Together with 1540543, it forms a pair of twin primes.

It is a Chen prime.

It is an Ulam number.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1540543) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 770270 + 770271.

It is an arithmetic number, because the mean of its divisors is an integer number (770271).

2^1540541 is an apocalyptic number.

It is an amenable number.

1540541 is a deficient number, since it is larger than the sum of its proper divisors (1).

1540541 is an equidigital number, since it uses as much as digits as its factorization.

1540541 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 400, while the sum is 20.

The square root of 1540541 is about 1241.1853205706. The cubic root of 1540541 is about 115.4935561081.

Adding to 1540541 its reverse (1450451), we get a palindrome (2990992).

The spelling of 1540541 in words is "one million, five hundred forty thousand, five hundred forty-one".