1211825028 has 48 divisors (see below), whose sum is σ = 2900580480. Its totient is φ = 393542400.

The previous prime is 1211825023. The next prime is 1211825033. The reversal of 1211825028 is 8205281121.

It is an interprime number because it is at equal distance from previous prime (1211825023) and next prime (1211825033).

It is a junction number, because it is equal to n+sod(n) for n = 1211824986 and 1211825004.

It is not an unprimeable number, because it can be changed into a prime (1211825023) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 506058 + ... + 508446.

It is an arithmetic number, because the mean of its divisors is an integer number (60428760).

Almost surely, 2^1211825028 is an apocalyptic number.

It is an amenable number.

1211825028 is an abundant number, since it is smaller than the sum of its proper divisors (1688755452).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1211825028 is a wasteful number, since it uses less digits than its factorization.

1211825028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3468 (or 3466 counting only the distinct ones).

The product of its (nonzero) digits is 2560, while the sum is 30.

The square root of 1211825028 is about 34811.2773106647. The cubic root of 1211825028 is about 1066.1377125209.

The spelling of 1211825028 in words is "one billion, two hundred eleven million, eight hundred twenty-five thousand, twenty-eight".