42001513 has 4 divisors (see below), whose sum is σ = 42091920. Its totient is φ = 41911108.

The previous prime is 42001511. The next prime is 42001517. The reversal of 42001513 is 31510024.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 42001513 - 2¹ = 42001511 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42001511) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 44503 + ... + 45436.

It is an arithmetic number, because the mean of its divisors is an integer number (10522980).

Almost surely, 2^42001513 is an apocalyptic number.

It is an amenable number.

42001513 is a deficient number, since it is larger than the sum of its proper divisors (90407).

42001513 is an equidigital number, since it uses as much as digits as its factorization.

42001513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90406.

The product of its (nonzero) digits is 120, while the sum is 16.

The square root of 42001513 is about 6480.8574278409. The cubic root of 42001513 is about 347.6068384293.

Adding to 42001513 its reverse (31510024), we get a palindrome (73511537).

The spelling of 42001513 in words is "forty-two million, one thousand, five hundred thirteen".