6407551 has 2 divisors, whose sum is σ = 6407552. Its totient is φ = 6407550.

The previous prime is 6407519. The next prime is 6407561. The reversal of 6407551 is 1557046.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 6407551 - 2⁵ = 6407519 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6407561) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3203775 + 3203776.

It is an arithmetic number, because the mean of its divisors is an integer number (3203776).

Almost surely, 2^6407551 is an apocalyptic number.

6407551 is a deficient number, since it is larger than the sum of its proper divisors (1).

6407551 is an equidigital number, since it uses as much as digits as its factorization.

6407551 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4200, while the sum is 28.

The square root of 6407551 is about 2531.3140856085. The cubic root of 6407551 is about 185.7365426410.

The spelling of 6407551 in words is "six million, four hundred seven thousand, five hundred fifty-one".