3891451 has 2 divisors, whose sum is σ = 3891452. Its totient is φ = 3891450.

The previous prime is 3891449. The next prime is 3891467. The reversal of 3891451 is 1541983.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 3891451 - 2¹ = 3891449 is a prime.

Together with 3891449, it forms a pair of twin primes.

3891451 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (3891431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1945725 + 1945726.

It is an arithmetic number, because the mean of its divisors is an integer number (1945726).

Almost surely, 2^3891451 is an apocalyptic number.

3891451 is a deficient number, since it is larger than the sum of its proper divisors (1).

3891451 is an equidigital number, since it uses as much as digits as its factorization.

3891451 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4320, while the sum is 31.

The square root of 3891451 is about 1972.6761011377. The cubic root of 3891451 is about 157.2909934467.

The spelling of 3891451 in words is "three million, eight hundred ninety-one thousand, four hundred fifty-one".