125200551 has 8 divisors (see below), whose sum is σ = 190781824. Its totient is φ = 71543160.

The previous prime is 125200549. The next prime is 125200553. The reversal of 125200551 is 155002521.

It is an interprime number because it is at equal distance from previous prime (125200549) and next prime (125200553).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 125200551 - 2¹ = 125200549 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21), and also a Moran number because the ratio is a prime number: 5961931 = 125200551 / (1 + 2 + 5 + 2 + 0 + 0 + 5 + 5 + 1).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125200553) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2980945 + ... + 2980986.

It is an arithmetic number, because the mean of its divisors is an integer number (23847728).

Almost surely, 2^125200551 is an apocalyptic number.

125200551 is a deficient number, since it is larger than the sum of its proper divisors (65581273).

125200551 is an equidigital number, since it uses as much as digits as its factorization.

125200551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5961941.

The product of its (nonzero) digits is 500, while the sum is 21.

The square root of 125200551 is about 11189.3052063120. The cubic root of 125200551 is about 500.2672584537.

It can be divided in two parts, 125200 and 551, that added together give a triangular number (125751 = T₅₀₁).

The spelling of 125200551 in words is "one hundred twenty-five million, two hundred thousand, five hundred fifty-one".