3421531 has 2 divisors, whose sum is σ = 3421532. Its totient is φ = 3421530.

The previous prime is 3421513. The next prime is 3421567. The reversal of 3421531 is 1351243.

Together with previous prime (3421513) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is an emirp because it is prime and its reverse (1351243) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 3421531 - 2⁵ = 3421499 is a prime.

It is a super-2 number, since 2×3421531² = 23413748767922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 3421499 and 3421508.

It is not a weakly prime, because it can be changed into another prime (3421591) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1710765 + 1710766.

It is an arithmetic number, because the mean of its divisors is an integer number (1710766).

Almost surely, 2^3421531 is an apocalyptic number.

3421531 is a deficient number, since it is larger than the sum of its proper divisors (1).

3421531 is an equidigital number, since it uses as much as digits as its factorization.

3421531 is an evil number, because the sum of its binary digits is even.

The product of its digits is 360, while the sum is 19.

The square root of 3421531 is about 1849.7380895684. The cubic root of 3421531 is about 150.6862041867.

Adding to 3421531 its reverse (1351243), we get a palindrome (4772774).

The spelling of 3421531 in words is "three million, four hundred twenty-one thousand, five hundred thirty-one".