3807421 has 2 divisors, whose sum is σ = 3807422. Its totient is φ = 3807420.

The previous prime is 3807413. The next prime is 3807431. The reversal of 3807421 is 1247083.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2340900 + 1466521 = 1530^2 + 1211^2 .

It is a cyclic number.

It is not a de Polignac number, because 3807421 - 2³ = 3807413 is a prime.

It is a pancake number, because a pancake can be divided into 3807421 parts by 2759 straight cuts.

It is equal to p₂₇₀₄₇₅ and since 3807421 and 270475 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3807431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1903710 + 1903711.

It is an arithmetic number, because the mean of its divisors is an integer number (1903711).

Almost surely, 2^3807421 is an apocalyptic number.

It is an amenable number.

3807421 is a deficient number, since it is larger than the sum of its proper divisors (1).

3807421 is an equidigital number, since it uses as much as digits as its factorization.

3807421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1344, while the sum is 25.

The square root of 3807421 is about 1951.2613868982. The cubic root of 3807421 is about 156.1505914883.

The spelling of 3807421 in words is "three million, eight hundred seven thousand, four hundred twenty-one".