5406520921 has 8 divisors (see below), whose sum is σ = 5647630464. Its totient is φ = 5165915040.

The previous prime is 5406520901. The next prime is 5406520939. The reversal of 5406520921 is 1290256045.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 5406520921 - 2⁹ = 5406520409 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5406520901) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 103885 + ... + 146986.

It is an arithmetic number, because the mean of its divisors is an integer number (705953808).

Almost surely, 2^5406520921 is an apocalyptic number.

It is an amenable number.

5406520921 is a deficient number, since it is larger than the sum of its proper divisors (241109543).

5406520921 is a wasteful number, since it uses less digits than its factorization.

5406520921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 251831.

The product of its (nonzero) digits is 21600, while the sum is 34.

The square root of 5406520921 is about 73529.0481442538. The cubic root of 5406520921 is about 1755.1165547329.

Adding to 5406520921 its reverse (1290256045), we get a palindrome (6696776966).

The spelling of 5406520921 in words is "five billion, four hundred six million, five hundred twenty thousand, nine hundred twenty-one".