401387 has 8 divisors (see below), whose sum is σ = 485856. Its totient is φ = 323712.

The previous prime is 401381. The next prime is 401393. The reversal of 401387 is 783104.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (401381) and next prime (401393).

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 401387 - 2⁴ = 401371 is a prime.

It is a super-2 number, since 2×401387² = 322223047538, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (401381) 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 7 ways as a sum of consecutive naturals, for example, 1568 + ... + 1805.

It is an arithmetic number, because the mean of its divisors is an integer number (60732).

2⁴⁰¹³⁸⁷ is an apocalyptic number.

401387 is a deficient number, since it is larger than the sum of its proper divisors (84469).

401387 is a wasteful number, since it uses less digits than its factorization.

401387 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3397.

The product of its (nonzero) digits is 672, while the sum is 23.

The square root of 401387 is about 633.5511029112. The cubic root of 401387 is about 73.7656942564.

The spelling of 401387 in words is "four hundred one thousand, three hundred eighty-seven".