125423784 has 144 divisors (see below), whose sum is σ = 368795700. Its totient is φ = 38472192.

The previous prime is 125423783. The next prime is 125423827. The reversal of 125423784 is 487324521.

It is a happy number.

125423784 is a `hidden beast` number, since 1 + 2 + 542 + 37 + 84 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 124947684 + 476100 = 11178^2 + 690^2 .

It is a super-2 number, since 2×125423784² = 31462251185757312, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (125423783) 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, 1409212 + ... + 1409300.

Almost surely, 2^125423784 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 125423784, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (184397850).

125423784 is an abundant number, since it is smaller than the sum of its proper divisors (243371916).

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

125423784 is a wasteful number, since it uses less digits than its factorization.

125423784 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 184 (or 154 counting only the distinct ones).

The product of its digits is 53760, while the sum is 36.

The square root of 125423784 is about 11199.2760480310. The cubic root of 125423784 is about 500.5644079809.

The spelling of 125423784 in words is "one hundred twenty-five million, four hundred twenty-three thousand, seven hundred eighty-four".