142774578 has 12 divisors (see below), whose sum is σ = 309344958. Its totient is φ = 47591520.

The previous prime is 142774559. The next prime is 142774589. The reversal of 142774578 is 875477241.

142774578 is a `hidden beast` number, since 1 + 4 + 2 + 7 + 74 + 578 = 666.

It can be written as a sum of positive squares in only one way, i.e., 127306089 + 15468489 = 11283^2 + 3933^2 .

It is a super-4 number, since 4×142774578⁴ (a number of 34 digits) contains 4444 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3965943 + ... + 3965978.

Almost surely, 2^142774578 is an apocalyptic number.

142774578 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

142774578 is an abundant number, since it is smaller than the sum of its proper divisors (166570380).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

142774578 is a wasteful number, since it uses less digits than its factorization.

142774578 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7931929 (or 7931926 counting only the distinct ones).

The product of its digits is 439040, while the sum is 45.

The square root of 142774578 is about 11948.8316583673. The cubic root of 142774578 is about 522.6572291488.

The spelling of 142774578 in words is "one hundred forty-two million, seven hundred seventy-four thousand, five hundred seventy-eight".