5402921 has 4 divisors (see below), whose sum is σ = 5407572. Its totient is φ = 5398272.

The previous prime is 5402909. The next prime is 5402933. The reversal of 5402921 is 1292045.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is an interprime number because it is at equal distance from previous prime (5402909) and next prime (5402933).

It can be written as a sum of positive squares in 2 ways, for example, as 3610000 + 1792921 = 1900^2 + 1339^2 .

It is a cyclic number.

It is not a de Polignac number, because 5402921 - 2¹⁰ = 5401897 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5402021) 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, 1085 + ... + 3461.

It is an arithmetic number, because the mean of its divisors is an integer number (1351893).

Almost surely, 2^5402921 is an apocalyptic number.

It is an amenable number.

5402921 is a deficient number, since it is larger than the sum of its proper divisors (4651).

5402921 is a wasteful number, since it uses less digits than its factorization.

5402921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4650.

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 5402921 is about 2324.4184218854. The cubic root of 5402921 is about 175.4726921307.

Adding to 5402921 its reverse (1292045), we get a palindrome (6694966).

The spelling of 5402921 in words is "five million, four hundred two thousand, nine hundred twenty-one".