1021812934 has 4 divisors (see below), whose sum is σ = 1532719404. Its totient is φ = 510906466.

The previous prime is 1021812907. The next prime is 1021812937. The reversal of 1021812934 is 4392181201.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 4392181201 = 29399 ⋅149399.

It is a junction number, because it is equal to n+sod(n) for n = 1021812896 and 1021812905.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1021812937) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 255453232 + ... + 255453235.

It is an arithmetic number, because the mean of its divisors is an integer number (383179851).

Almost surely, 2^1021812934 is an apocalyptic number.

1021812934 is a deficient number, since it is larger than the sum of its proper divisors (510906470).

1021812934 is an equidigital number, since it uses as much as digits as its factorization.

1021812934 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 510906469.

The product of its (nonzero) digits is 3456, while the sum is 31.

The square root of 1021812934 is about 31965.8088275582. The cubic root of 1021812934 is about 1007.2187423685.

The spelling of 1021812934 in words is "one billion, twenty-one million, eight hundred twelve thousand, nine hundred thirty-four".