1230821834 has 16 divisors (see below), whose sum is σ = 2014674336. Its totient is φ = 559297200.

The previous prime is 1230821831. The next prime is 1230821863. The reversal of 1230821834 is 4381280321.

It is a super-2 number, since 2×1230821834² = 3029844774102247112, which contains 22 as substring.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1230821834.

It is not an unprimeable number, because it can be changed into a prime (1230821831) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 95609 + ... + 107715.

It is an arithmetic number, because the mean of its divisors is an integer number (125917146).

Almost surely, 2^1230821834 is an apocalyptic number.

1230821834 is a deficient number, since it is larger than the sum of its proper divisors (783852502).

1230821834 is a wasteful number, since it uses less digits than its factorization.

1230821834 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16741.

The product of its (nonzero) digits is 9216, while the sum is 32.

The square root of 1230821834 is about 35083.0704756582. The cubic root of 1230821834 is about 1071.6798471494.

The spelling of 1230821834 in words is "one billion, two hundred thirty million, eight hundred twenty-one thousand, eight hundred thirty-four".