247142460 has 48 divisors (see below), whose sum is σ = 700350336. Its totient is φ = 65109312.

The previous prime is 247142459. The next prime is 247142461. The reversal of 247142460 is 64241742.

It is an interprime number because it is at equal distance from previous prime (247142459) and next prime (247142461).

It is a super-2 number, since 2×247142460² = 122158791069703200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (247142461) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19834 + ... + 29793.

It is an arithmetic number, because the mean of its divisors is an integer number (14590632).

Almost surely, 2^247142460 is an apocalyptic number.

247142460 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

247142460 is an abundant number, since it is smaller than the sum of its proper divisors (453207876).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

247142460 is a wasteful number, since it uses less digits than its factorization.

247142460 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49722 (or 49720 counting only the distinct ones).

The product of its (nonzero) digits is 10752, while the sum is 30.

The square root of 247142460 is about 15720.7652485494. The cubic root of 247142460 is about 627.5511384068.

The spelling of 247142460 in words is "two hundred forty-seven million, one hundred forty-two thousand, four hundred sixty".