142401778 has 8 divisors (see below), whose sum is σ = 217633068. Its totient is φ = 69857424.

The previous prime is 142401737. The next prime is 142401781. The reversal of 142401778 is 877104241.

142401778 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 141063129 + 1338649 = 11877^2 + 1157^2 .

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

It is a super-2 number, since 2×142401778² = 40556532755122568, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 671601 + ... + 671812.

Almost surely, 2^142401778 is an apocalyptic number.

142401778 is a deficient number, since it is larger than the sum of its proper divisors (75231290).

142401778 is a wasteful number, since it uses less digits than its factorization.

142401778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1343468.

The product of its (nonzero) digits is 12544, while the sum is 34.

The square root of 142401778 is about 11933.2216102778. The cubic root of 142401778 is about 522.2019276220.

The spelling of 142401778 in words is "one hundred forty-two million, four hundred one thousand, seven hundred seventy-eight".