247401 has 48 divisors (see below), whose sum is σ = 492480. Its totient is φ = 120960.

The previous prime is 247393. The next prime is 247409. The reversal of 247401 is 104742.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (247393) and next prime (247409).

It is not a de Polignac number, because 247401 - 2³ = 247393 is a prime.

It is a super-2 number, since 2×247401² = 122414509602, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (247409) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 14545 + ... + 14561.

It is an arithmetic number, because the mean of its divisors is an integer number (10260).

2²⁴⁷⁴⁰¹ is an apocalyptic number.

247401 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

247401 is a deficient number, since it is larger than the sum of its proper divisors (245079).

247401 is a wasteful number, since it uses less digits than its factorization.

247401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51 (or 38 counting only the distinct ones).

The product of its (nonzero) digits is 224, while the sum is 18.

The square root of 247401 is about 497.3942098577. The cubic root of 247401 is about 62.7769892842.

The spelling of 247401 in words is "two hundred forty-seven thousand, four hundred one", and thus it is an iban number.