78134522 has 8 divisors (see below), whose sum is σ = 117297396. Its totient is φ = 39035392.

The previous prime is 78134521. The next prime is 78134527. The reversal of 78134522 is 22543187.

It can be written as a sum of positive squares in 2 ways, for example, as 75881521 + 2253001 = 8711^2 + 1501^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×78134522² = 12210007056336968, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (78134521) 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, 12743 + ... + 17850.

Almost surely, 2^78134522 is an apocalyptic number.

78134522 is a deficient number, since it is larger than the sum of its proper divisors (39162874).

78134522 is a wasteful number, since it uses less digits than its factorization.

78134522 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31872.

The product of its digits is 13440, while the sum is 32.

The square root of 78134522 is about 8839.3733940817. The cubic root of 78134522 is about 427.5113538473.

The spelling of 78134522 in words is "seventy-eight million, one hundred thirty-four thousand, five hundred twenty-two".