1021199974 has 4 divisors (see below), whose sum is σ = 1531799964. Its totient is φ = 510599986.

The previous prime is 1021199969. The next prime is 1021199983. The reversal of 1021199974 is 4799911201.

It is a semiprime because it is the product of two primes.

It is a self number, because there is not a number n which added to its sum of digits gives 1021199974.

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 as a sum of consecutive naturals, namely, 255299992 + ... + 255299995.

It is an arithmetic number, because the mean of its divisors is an integer number (382949991).

Almost surely, 2^1021199974 is an apocalyptic number.

1021199974 is a deficient number, since it is larger than the sum of its proper divisors (510599990).

1021199974 is an equidigital number, since it uses as much as digits as its factorization.

1021199974 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 510599989.

The product of its (nonzero) digits is 40824, while the sum is 43.

The square root of 1021199974 is about 31956.2196450081. The cubic root of 1021199974 is about 1007.0173003132.

The spelling of 1021199974 in words is "one billion, twenty-one million, one hundred ninety-nine thousand, nine hundred seventy-four".