987401 has 4 divisors (see below), whose sum is σ = 989904. Its totient is φ = 984900.

The previous prime is 987391. The next prime is 987433. The reversal of 987401 is 104789.

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 a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-987401 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (987491) 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, 515 + ... + 1496.

It is an arithmetic number, because the mean of its divisors is an integer number (247476).

2⁹⁸⁷⁴⁰¹ is an apocalyptic number.

It is an amenable number.

987401 is a deficient number, since it is larger than the sum of its proper divisors (2503).

987401 is a wasteful number, since it uses less digits than its factorization.

987401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2502.

The product of its (nonzero) digits is 2016, while the sum is 29.

The square root of 987401 is about 993.6805321631. The cubic root of 987401 is about 99.5782571636.

The spelling of 987401 in words is "nine hundred eighty-seven thousand, four hundred one".