6987401 has 4 divisors (see below), whose sum is σ = 6994452. Its totient is φ = 6980352.

The previous prime is 6987397. The next prime is 6987403. The reversal of 6987401 is 1047896.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 5359225 + 1628176 = 2315^2 + 1276^2 .

It is a cyclic number.

It is not a de Polignac number, because 6987401 - 2² = 6987397 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6987403) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1736 + ... + 4121.

It is an arithmetic number, because the mean of its divisors is an integer number (1748613).

Almost surely, 2^6987401 is an apocalyptic number.

It is an amenable number.

6987401 is a deficient number, since it is larger than the sum of its proper divisors (7051).

6987401 is a wasteful number, since it uses less digits than its factorization.

6987401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7050.

The product of its (nonzero) digits is 12096, while the sum is 35.

The square root of 6987401 is about 2643.3692515424. The cubic root of 6987401 is about 191.1782825919.

The spelling of 6987401 in words is "six million, nine hundred eighty-seven thousand, four hundred one".