540401421 has 16 divisors (see below), whose sum is σ = 827103744. Its totient is φ = 307437744.

The previous prime is 540401419. The next prime is 540401429. The reversal of 540401421 is 124104045.

It is a happy number.

540401421 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 540401421 - 2¹ = 540401419 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (540401429) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 51915 + ... + 61448.

It is an arithmetic number, because the mean of its divisors is an integer number (51693984).

Almost surely, 2^540401421 is an apocalyptic number.

It is an amenable number.

540401421 is a deficient number, since it is larger than the sum of its proper divisors (286702323).

540401421 is a wasteful number, since it uses less digits than its factorization.

540401421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 113600.

The product of its (nonzero) digits is 640, while the sum is 21.

The square root of 540401421 is about 23246.5356773864. The cubic root of 540401421 is about 814.5270172649.

Adding to 540401421 its reverse (124104045), we get a palindrome (664505466).

The spelling of 540401421 in words is "five hundred forty million, four hundred one thousand, four hundred twenty-one".