2545400 has 96 divisors (see below), whose sum is σ = 7030800. Its totient is φ = 844800.

The previous prime is 2545369. The next prime is 2545429. The reversal of 2545400 is 45452.

It is a happy number.

It is a super-2 number, since 2×2545400² = 12958122320000, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 28556 + ... + 28644.

2^2545400 is an apocalyptic number.

2545400 is a gapful number since it is divisible by the number (20) 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 2545400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3515400).

2545400 is an abundant number, since it is smaller than the sum of its proper divisors (4485400).

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

2545400 is a wasteful number, since it uses less digits than its factorization.

2545400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129 (or 120 counting only the distinct ones).

The product of its (nonzero) digits is 800, while the sum is 20.

The square root of 2545400 is about 1595.4309762569. The cubic root of 2545400 is about 136.5375209372.

The spelling of 2545400 in words is "two million, five hundred forty-five thousand, four hundred".