427240143 has 32 divisors (see below), whose sum is σ = 692025600. Its totient is φ = 258357600.

The previous prime is 427240133. The next prime is 427240153. The reversal of 427240143 is 341042724.

It is an interprime number because it is at equal distance from previous prime (427240133) and next prime (427240153).

It is a de Polignac number, because none of the positive numbers 2^k-427240143 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (427240133) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 159348 + ... + 162006.

It is an arithmetic number, because the mean of its divisors is an integer number (21625800).

Almost surely, 2^427240143 is an apocalyptic number.

427240143 is a deficient number, since it is larger than the sum of its proper divisors (264785457).

427240143 is a wasteful number, since it uses less digits than its factorization.

427240143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3220 (or 3214 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 27.

The square root of 427240143 is about 20669.7881701773. The cubic root of 427240143 is about 753.1659607848.

Adding to 427240143 its reverse (341042724), we get a palindrome (768282867).

The spelling of 427240143 in words is "four hundred twenty-seven million, two hundred forty thousand, one hundred forty-three".