3100421 has 2 divisors, whose sum is σ = 3100422. Its totient is φ = 3100420.

The previous prime is 3100373. The next prime is 3100463. The reversal of 3100421 is 1240013.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2265025 + 835396 = 1505^2 + 914^2 .

It is an emirp because it is prime and its reverse (1240013) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3100421 is a prime.

It is a super-2 number, since 2×3100421² = 19225220754482, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3100621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1550210 + 1550211.

It is an arithmetic number, because the mean of its divisors is an integer number (1550211).

Almost surely, 2^3100421 is an apocalyptic number.

It is an amenable number.

3100421 is a deficient number, since it is larger than the sum of its proper divisors (1).

3100421 is an equidigital number, since it uses as much as digits as its factorization.

3100421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 24, while the sum is 11.

The square root of 3100421 is about 1760.8012380732. The cubic root of 3100421 is about 145.8165739289.

Adding to 3100421 its reverse (1240013), we get a palindrome (4340434).

The spelling of 3100421 in words is "three million, one hundred thousand, four hundred twenty-one".