1016978542 has 4 divisors (see below), whose sum is σ = 1525467816. Its totient is φ = 508489270.

The previous prime is 1016978531. The next prime is 1016978551. The reversal of 1016978542 is 2458796101.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 2458796101 = 71 ⋅34630931.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 254244634 + ... + 254244637.

It is an arithmetic number, because the mean of its divisors is an integer number (381366954).

Almost surely, 2^1016978542 is an apocalyptic number.

1016978542 is a deficient number, since it is larger than the sum of its proper divisors (508489274).

1016978542 is an equidigital number, since it uses as much as digits as its factorization.

1016978542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 508489273.

The product of its (nonzero) digits is 120960, while the sum is 43.

The square root of 1016978542 is about 31890.1010032894. The cubic root of 1016978542 is about 1005.6277826482.

The spelling of 1016978542 in words is "one billion, sixteen million, nine hundred seventy-eight thousand, five hundred forty-two".