6401487 has 8 divisors (see below), whose sum is σ = 8593200. Its totient is φ = 4238720.

The previous prime is 6401477. The next prime is 6401497. The reversal of 6401487 is 7841046.

It is an interprime number because it is at equal distance from previous prime (6401477) and next prime (6401497).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 6401487 - 2⁴ = 6401471 is a prime.

It is a super-2 number, since 2×6401487² = 81958071622338, which contains 22 as substring.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6401467) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6714 + ... + 7607.

It is an arithmetic number, because the mean of its divisors is an integer number (1074150).

Almost surely, 2^6401487 is an apocalyptic number.

6401487 is a deficient number, since it is larger than the sum of its proper divisors (2191713).

6401487 is a wasteful number, since it uses less digits than its factorization.

6401487 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14473.

The product of its (nonzero) digits is 5376, while the sum is 30.

The square root of 6401487 is about 2530.1160052456. The cubic root of 6401487 is about 185.6779314864.

The spelling of 6401487 in words is "six million, four hundred one thousand, four hundred eighty-seven".