1042645978 has 8 divisors (see below), whose sum is σ = 1706148000. Its totient is φ = 473929980.

The previous prime is 1042645951. The next prime is 1042646021. The reversal of 1042645978 is 8795462401.

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

It is a super-2 number, since 2×1042645978² = 2174221270879152968, 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, 23696478 + ... + 23696521.

It is an arithmetic number, because the mean of its divisors is an integer number (213268500).

Almost surely, 2^1042645978 is an apocalyptic number.

1042645978 is a deficient number, since it is larger than the sum of its proper divisors (663502022).

1042645978 is a wasteful number, since it uses less digits than its factorization.

1042645978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47393012.

The product of its (nonzero) digits is 483840, while the sum is 46.

The square root of 1042645978 is about 32290.0290801975. The cubic root of 1042645978 is about 1014.0179061271.

The spelling of 1042645978 in words is "one billion, forty-two million, six hundred forty-five thousand, nine hundred seventy-eight".