4540142 has 4 divisors (see below), whose sum is σ = 6810216. Its totient is φ = 2270070.

The previous prime is 4540127. The next prime is 4540147. The reversal of 4540142 is 2410454.

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

It is a super-2 number, since 2×4540142² = 41225778760328, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4540147) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1135034 + ... + 1135037.

It is an arithmetic number, because the mean of its divisors is an integer number (1702554).

Almost surely, 2^4540142 is an apocalyptic number.

4540142 is a deficient number, since it is larger than the sum of its proper divisors (2270074).

4540142 is a wasteful number, since it uses less digits than its factorization.

4540142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2270073.

The product of its (nonzero) digits is 640, while the sum is 20.

The square root of 4540142 is about 2130.7608969568. The cubic root of 4540142 is about 165.5858208977.

Adding to 4540142 its reverse (2410454), we get a palindrome (6950596).

It can be divided in two parts, 4540 and 142, that multiplied together give a triangular number (644680 = T₁₁₃₅).

The spelling of 4540142 in words is "four million, five hundred forty thousand, one hundred forty-two".