3420042517 has 4 divisors (see below), whose sum is σ = 3421697580. Its totient is φ = 3418387456.

The previous prime is 3420042499. The next prime is 3420042551. The reversal of 3420042517 is 7152400243.

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

It can be written as a sum of positive squares in 2 ways, for example, as 347114161 + 3072928356 = 18631^2 + 55434^2 .

It is a cyclic number.

It is not a de Polignac number, because 3420042517 - 2²³ = 3411653909 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3420040517) 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, 824428 + ... + 828565.

It is an arithmetic number, because the mean of its divisors is an integer number (855424395).

Almost surely, 2^3420042517 is an apocalyptic number.

It is an amenable number.

3420042517 is a deficient number, since it is larger than the sum of its proper divisors (1655063).

3420042517 is a wasteful number, since it uses less digits than its factorization.

3420042517 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1655062.

The product of its (nonzero) digits is 6720, while the sum is 28.

The square root of 3420042517 is about 58481.1295804040. The cubic root of 3420042517 is about 1506.6434979980.

The spelling of 3420042517 in words is "three billion, four hundred twenty million, forty-two thousand, five hundred seventeen".