1210256400 has 60 divisors (see below), whose sum is σ = 3876858512. Its totient is φ = 322734720.

The previous prime is 1210256353. The next prime is 1210256407. The reversal of 1210256400 is 46520121.

It is a tau number, because it is divible by the number of its divisors (60).

It is not an unprimeable number, because it can be changed into a prime (1210256407) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 503074 + ... + 505473.

Almost surely, 2^1210256400 is an apocalyptic number.

1210256400 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1210256400 is an abundant number, since it is smaller than the sum of its proper divisors (2666602112).

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

1210256400 is a wasteful number, since it uses less digits than its factorization.

1210256400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1008568 (or 1008557 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 21.

The square root of 1210256400 is about 34788.7395575062. The cubic root of 1210256400 is about 1065.6774987824.

Adding to 1210256400 its reverse (46520121), we get a palindrome (1256776521).

The spelling of 1210256400 in words is "one billion, two hundred ten million, two hundred fifty-six thousand, four hundred".