6407157 has 4 divisors (see below), whose sum is σ = 8542880. Its totient is φ = 4271436.

The previous prime is 6407131. The next prime is 6407189. The reversal of 6407157 is 7517046.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 6407157 - 2²⁰ = 5358581 is a prime.

It is a D-number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6407197) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1067857 + ... + 1067862.

It is an arithmetic number, because the mean of its divisors is an integer number (2135720).

Almost surely, 2^6407157 is an apocalyptic number.

It is an amenable number.

6407157 is a deficient number, since it is larger than the sum of its proper divisors (2135723).

6407157 is a wasteful number, since it uses less digits than its factorization.

6407157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2135722.

The product of its (nonzero) digits is 5880, while the sum is 30.

The square root of 6407157 is about 2531.2362592220. The cubic root of 6407157 is about 185.7327355860.

The spelling of 6407157 in words is "six million, four hundred seven thousand, one hundred fifty-seven".