3540421 has 2 divisors, whose sum is σ = 3540422. Its totient is φ = 3540420.

The previous prime is 3540401. The next prime is 3540443. The reversal of 3540421 is 1240453.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2512225 + 1028196 = 1585^2 + 1014^2 .

It is a cyclic number.

It is not a de Polignac number, because 3540421 - 2¹⁹ = 3016133 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3540401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1770210 + 1770211.

It is an arithmetic number, because the mean of its divisors is an integer number (1770211).

Almost surely, 2^3540421 is an apocalyptic number.

It is an amenable number.

3540421 is a deficient number, since it is larger than the sum of its proper divisors (1).

3540421 is an equidigital number, since it uses as much as digits as its factorization.

3540421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 480, while the sum is 19.

The square root of 3540421 is about 1881.6006483842. The cubic root of 3540421 is about 152.4116984106.

Adding to 3540421 its reverse (1240453), we get a palindrome (4780874).

Subtracting from 3540421 its reverse (1240453), we obtain a cube (2299968 = 132³).

The spelling of 3540421 in words is "three million, five hundred forty thousand, four hundred twenty-one".