1202123400 has 96 divisors (see below), whose sum is σ = 3736219200. Its totient is φ = 319737600.

The previous prime is 1202123389. The next prime is 1202123413. The reversal of 1202123400 is 43212021.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 1202123400.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 250221 + ... + 254979.

It is an arithmetic number, because the mean of its divisors is an integer number (38918950).

Almost surely, 2^1202123400 is an apocalyptic number.

1202123400 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1202123400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1868109600).

1202123400 is an abundant number, since it is smaller than the sum of its proper divisors (2534095800).

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

1202123400 is a wasteful number, since it uses less digits than its factorization.

1202123400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5199 (or 5190 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 15.

The square root of 1202123400 is about 34671.6512442081. The cubic root of 1202123400 is about 1063.2849912892.

Adding to 1202123400 its reverse (43212021), we get a palindrome (1245335421).

The spelling of 1202123400 in words is "one billion, two hundred two million, one hundred twenty-three thousand, four hundred".