1210405200 has 120 divisors (see below), whose sum is σ = 3898369536. Its totient is φ = 321024000.

The previous prime is 1210405193. The next prime is 1210405201. The reversal of 1210405200 is 25040121.

It is a tau number, because it is divible by the number of its divisors (120).

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 1210405200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1210405201) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 226560 + ... + 231840.

Almost surely, 2^1210405200 is an apocalyptic number.

1210405200 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 1210405200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1949184768).

1210405200 is an abundant number, since it is smaller than the sum of its proper divisors (2687964336).

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

1210405200 is a wasteful number, since it uses less digits than its factorization.

1210405200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5493 (or 5482 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 15.

The square root of 1210405200 is about 34790.8781148162. The cubic root of 1210405200 is about 1065.7211717081.

Adding to 1210405200 its reverse (25040121), we get a palindrome (1235445321).

The spelling of 1210405200 in words is "one billion, two hundred ten million, four hundred five thousand, two hundred".