125554506 has 64 divisors (see below), whose sum is σ = 314357760. Its totient is φ = 32477760.

The previous prime is 125554501. The next prime is 125554511. The reversal of 125554506 is 605455521.

It is an interprime number because it is at equal distance from previous prime (125554501) and next prime (125554511).

It is a Harshad number since it is a multiple of its sum of digits (33).

It is not an unprimeable number, because it can be changed into a prime (125554501) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 165480 + ... + 166236.

It is an arithmetic number, because the mean of its divisors is an integer number (4911840).

Almost surely, 2^125554506 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 125554506, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (157178880).

125554506 is an abundant number, since it is smaller than the sum of its proper divisors (188803254).

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

125554506 is a wasteful number, since it uses less digits than its factorization.

125554506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1139.

The product of its (nonzero) digits is 30000, while the sum is 33.

The square root of 125554506 is about 11205.1107089578. The cubic root of 125554506 is about 500.7382507685.

The spelling of 125554506 in words is "one hundred twenty-five million, five hundred fifty-four thousand, five hundred six".