42142797 has 12 divisors (see below), whose sum is σ = 61051900. Its totient is φ = 28012608.

The previous prime is 42142781. The next prime is 42142823. The reversal of 42142797 is 79724124.

It can be written as a sum of positive squares in 2 ways, for example, as 23532201 + 18610596 = 4851^2 + 4314^2 .

It is not a de Polignac number, because 42142797 - 2⁴ = 42142781 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 (42144797) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3568 + ... + 9849.

Almost surely, 2^42142797 is an apocalyptic number.

It is an amenable number.

42142797 is a deficient number, since it is larger than the sum of its proper divisors (18909103).

42142797 is a wasteful number, since it uses less digits than its factorization.

42142797 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13772 (or 13769 counting only the distinct ones).

The product of its digits is 28224, while the sum is 36.

The square root of 42142797 is about 6491.7483777485. The cubic root of 42142797 is about 347.9961602826.

The spelling of 42142797 in words is "forty-two million, one hundred forty-two thousand, seven hundred ninety-seven".