4157540 has 12 divisors (see below), whose sum is σ = 8730876. Its totient is φ = 1663008.

The previous prime is 4157513. The next prime is 4157563. The reversal of 4157540 is 457514.

It can be written as a sum of positive squares in 2 ways, for example, as 1623076 + 2534464 = 1274^2 + 1592^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 103919 + ... + 103958.

It is an arithmetic number, because the mean of its divisors is an integer number (727573).

Almost surely, 2^4157540 is an apocalyptic number.

It is an amenable number.

4157540 is an abundant number, since it is smaller than the sum of its proper divisors (4573336).

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

4157540 is a wasteful number, since it uses less digits than its factorization.

4157540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 207886 (or 207884 counting only the distinct ones).

The product of its (nonzero) digits is 2800, while the sum is 26.

The square root of 4157540 is about 2039.0046591413. The cubic root of 4157540 is about 160.7973222164.

Subtracting from 4157540 its sum of digits (26), we obtain a palindrome (4157514).

The spelling of 4157540 in words is "four million, one hundred fifty-seven thousand, five hundred forty".