1977242142 has 8 divisors (see below), whose sum is σ = 3954484296. Its totient is φ = 659080712.

The previous prime is 1977242131. The next prime is 1977242203. The reversal of 1977242142 is 2412427791.

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

1977242142 is an admirable number.

It is a self number, because there is not a number n which added to its sum of digits gives 1977242142.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 164770173 + ... + 164770184.

It is an arithmetic number, because the mean of its divisors is an integer number (494310537).

Almost surely, 2^1977242142 is an apocalyptic number.

1977242142 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

1977242142 is a wasteful number, since it uses less digits than its factorization.

1977242142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 329540362.

The product of its digits is 56448, while the sum is 39.

The square root of 1977242142 is about 44466.1909994549. The cubic root of 1977242142 is about 1255.1239576402.

The spelling of 1977242142 in words is "one billion, nine hundred seventy-seven million, two hundred forty-two thousand, one hundred forty-two".