247402 has 4 divisors (see below), whose sum is σ = 371106. Its totient is φ = 123700.

The previous prime is 247393. The next prime is 247409. The reversal of 247402 is 204742.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 239121 + 8281 = 489^2 + 91^2 .

It is a super-2 number, since 2×247402² = 122415499208, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 247402.

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 as a sum of consecutive naturals, namely, 61849 + ... + 61852.

2²⁴⁷⁴⁰² is an apocalyptic number.

247402 is a deficient number, since it is larger than the sum of its proper divisors (123704).

247402 is a wasteful number, since it uses less digits than its factorization.

247402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 123703.

The product of its (nonzero) digits is 448, while the sum is 19.

The square root of 247402 is about 497.3952150956. The cubic root of 247402 is about 62.7770738660. Note that the first 3 decimals are identical.

It can be divided in two parts, 24740 and 2, that added together give a palindrome (24742).

The spelling of 247402 in words is "two hundred forty-seven thousand, four hundred two", and thus it is an iban number.