5490921 has 4 divisors (see below), whose sum is σ = 7321232. Its totient is φ = 3660612.

The previous prime is 5490913. The next prime is 5490923. The reversal of 5490921 is 1290945.

It is a happy number.

5490921 is digitally balanced in base 3 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 5490921 - 2³ = 5490913 is a prime.

It is a D-number.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5490923) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 915151 + ... + 915156.

It is an arithmetic number, because the mean of its divisors is an integer number (1830308).

Almost surely, 2^5490921 is an apocalyptic number.

It is an amenable number.

5490921 is a deficient number, since it is larger than the sum of its proper divisors (1830311).

5490921 is a wasteful number, since it uses less digits than its factorization.

5490921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1830310.

The product of its (nonzero) digits is 3240, while the sum is 30.

The square root of 5490921 is about 2343.2714311407. The cubic root of 5490921 is about 176.4202359023.

The spelling of 5490921 in words is "five million, four hundred ninety thousand, nine hundred twenty-one".