1125004521420 has 288 divisors, whose sum is σ = 3732855060480. Its totient is φ = 272572439040.

The previous prime is 1125004521409. The next prime is 1125004521461. The reversal of 1125004521420 is 241254005211.

It is a happy number.

1125004521420 is a `hidden beast` number, since 1 + 12 + 500 + 4 + 5 + 2 + 142 + 0 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 287062221 + ... + 287066139.

Almost surely, 2^{1125004521420} is an apocalyptic number.

1125004521420 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 1125004521420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1866427530240).

1125004521420 is an abundant number, since it is smaller than the sum of its proper divisors (2607850539060).

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

1125004521420 is a wasteful number, since it uses less digits than its factorization.

1125004521420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5845 (or 5840 counting only the distinct ones).

The product of its (nonzero) digits is 3200, while the sum is 27.

Adding to 1125004521420 its reverse (241254005211), we get a palindrome (1366258526631).

The spelling of 1125004521420 in words is "one trillion, one hundred twenty-five billion, four million, five hundred twenty-one thousand, four hundred twenty".