78142701 has 48 divisors (see below), whose sum is σ = 132123264. Its totient is φ = 40715136.

The previous prime is 78142697. The next prime is 78142721. The reversal of 78142701 is 10724187.

It is not a de Polignac number, because 78142701 - 2² = 78142697 is a prime.

It is a super-2 number, since 2×78142701² = 12212563439150802, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78142721) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 196635 + ... + 197031.

It is an arithmetic number, because the mean of its divisors is an integer number (2752568).

Almost surely, 2^78142701 is an apocalyptic number.

It is an amenable number.

78142701 is a deficient number, since it is larger than the sum of its proper divisors (53980563).

78142701 is a wasteful number, since it uses less digits than its factorization.

78142701 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 530 (or 523 counting only the distinct ones).

The product of its (nonzero) digits is 3136, while the sum is 30.

The square root of 78142701 is about 8839.8360278910. The cubic root of 78142701 is about 427.5262704009.

Adding to 78142701 its reverse (10724187), we get a palindrome (88866888).

The spelling of 78142701 in words is "seventy-eight million, one hundred forty-two thousand, seven hundred one".