12651400 has 72 divisors (see below), whose sum is σ = 31663710. Its totient is φ = 4684800.

The previous prime is 12651389. The next prime is 12651407. The reversal of 12651400 is 415621.

It can be written as a sum of positive squares in 9 ways, for example, as 527076 + 12124324 = 726^2 + 3482^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12651407) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 207370 + ... + 207430.

Almost surely, 2^12651400 is an apocalyptic number.

12651400 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 12651400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15831855).

12651400 is an abundant number, since it is smaller than the sum of its proper divisors (19012310).

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

12651400 is a wasteful number, since it uses less digits than its factorization.

12651400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 155 (or 85 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 19.

The square root of 12651400 is about 3556.8806558556. The cubic root of 12651400 is about 233.0126660886.

The spelling of 12651400 in words is "twelve million, six hundred fifty-one thousand, four hundred".