142230978 has 30 divisors (see below), whose sum is σ = 319043241. Its totient is φ = 47359728.

The previous prime is 142230973. The next prime is 142231013. The reversal of 142230978 is 879032241.

It can be written as a sum of positive squares in 2 ways, for example, as 102880449 + 39350529 = 10143^2 + 6273^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=8433.

It is a super-2 number, since 2×142230978² = 40459302205672968, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (142230973) by changing a digit.

It is a polite number, since it can be written in 14 ways as a sum of consecutive naturals, for example, 151326 + ... + 152262.

Almost surely, 2^142230978 is an apocalyptic number.

142230978 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

142230978 is an abundant number, since it is smaller than the sum of its proper divisors (176812263).

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

142230978 is an frugal number, since it uses more digits than its factorization.

142230978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1888 (or 942 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 36.

The square root of 142230978 is about 11926.0629714923. The cubic root of 142230978 is about 521.9930637208.

It can be divided in two parts, 1422 and 30978, that added together give a square (32400 = 180²).

The spelling of 142230978 in words is "one hundred forty-two million, two hundred thirty thousand, nine hundred seventy-eight".