5457421 has 2 divisors, whose sum is σ = 5457422. Its totient is φ = 5457420.

The previous prime is 5457383. The next prime is 5457433. The reversal of 5457421 is 1247545.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5221225 + 236196 = 2285^2 + 486^2 .

It is a cyclic number.

It is not a de Polignac number, because 5457421 - 2⁷ = 5457293 is a prime.

It is an Ulam number.

5457421 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 5457421.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5457451) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2728710 + 2728711.

It is an arithmetic number, because the mean of its divisors is an integer number (2728711).

Almost surely, 2^5457421 is an apocalyptic number.

It is an amenable number.

5457421 is a deficient number, since it is larger than the sum of its proper divisors (1).

5457421 is an equidigital number, since it uses as much as digits as its factorization.

5457421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5600, while the sum is 28.

The square root of 5457421 is about 2336.1123688727. The cubic root of 5457421 is about 176.0607249996.

It can be divided in two parts, 54 and 57421, that added together give a palindrome (57475).

The spelling of 5457421 in words is "five million, four hundred fifty-seven thousand, four hundred twenty-one".