125001851 has 4 divisors (see below), whose sum is σ = 134617392. Its totient is φ = 115386312.

The previous prime is 125001847. The next prime is 125001853. The reversal of 125001851 is 158100521.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 158100521 = 457 ⋅345953.

It is a cyclic number.

It is not a de Polignac number, because 125001851 - 2² = 125001847 is a prime.

It is not an unprimeable number, because it can be changed into a prime (125001853) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4807751 + ... + 4807776.

It is an arithmetic number, because the mean of its divisors is an integer number (33654348).

Almost surely, 2^125001851 is an apocalyptic number.

125001851 is a deficient number, since it is larger than the sum of its proper divisors (9615541).

125001851 is an equidigital number, since it uses as much as digits as its factorization.

125001851 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9615540.

The product of its (nonzero) digits is 400, while the sum is 23.

The square root of 125001851 is about 11180.4226664290. The cubic root of 125001851 is about 500.0024679878.

The spelling of 125001851 in words is "one hundred twenty-five million, one thousand, eight hundred fifty-one".