247142140 has 24 divisors (see below), whose sum is σ = 593141472. Its totient is φ = 84734400.

The previous prime is 247142123. The next prime is 247142167. The reversal of 247142140 is 41241742.

It is a super-2 number, since 2×247142140² = 122158474727559200, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 882511 + ... + 882790.

It is an arithmetic number, because the mean of its divisors is an integer number (24714228).

Almost surely, 2^247142140 is an apocalyptic number.

247142140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

247142140 is an abundant number, since it is smaller than the sum of its proper divisors (345999332).

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

247142140 is a wasteful number, since it uses less digits than its factorization.

247142140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1765317 (or 1765315 counting only the distinct ones).

The product of its (nonzero) digits is 1792, while the sum is 25.

The square root of 247142140 is about 15720.7550709246. The cubic root of 247142140 is about 627.5508675557.

Adding to 247142140 its reverse (41241742), we get a palindrome (288383882).

The spelling of 247142140 in words is "two hundred forty-seven million, one hundred forty-two thousand, one hundred forty".