1200005400 has 144 divisors (see below), whose sum is σ = 4089191400. Its totient is φ = 290892800.

The previous prime is 1200005371. The next prime is 1200005407. The reversal of 1200005400 is 45000021.

It is a Harshad number since it is a multiple of its sum of digits (12).

1200005400 is a modest number, since divided by 5400 gives 1200 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1200005407) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 64336 + ... + 80864.

Almost surely, 2^1200005400 is an apocalyptic number.

1200005400 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 1200005400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2044595700).

1200005400 is an abundant number, since it is smaller than the sum of its proper divisors (2889186000).

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

1200005400 is a wasteful number, since it uses less digits than its factorization.

1200005400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16570 (or 16550 counting only the distinct ones).

The product of its (nonzero) digits is 40, while the sum is 12.

The square root of 1200005400 is about 34641.0940935762. The cubic root of 1200005400 is about 1062.6601631681.

Adding to 1200005400 its reverse (45000021), we get a palindrome (1245005421).

The spelling of 1200005400 in words is "one billion, two hundred million, five thousand, four hundred".