125802001 has 4 divisors (see below), whose sum is σ = 135479092. Its totient is φ = 116124912.

The previous prime is 125801993. The next prime is 125802007. The reversal of 125802001 is 100208521.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 100208521 = 7 ⋅14315503.

It can be written as a sum of positive squares in 2 ways, for example, as 13950225 + 111851776 = 3735^2 + 10576^2 .

It is a cyclic number.

It is not a de Polignac number, because 125802001 - 2³ = 125801993 is a prime.

It is a super-2 number, since 2×125802001² = 31652286911208002, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 125802001.

It is not an unprimeable number, because it can be changed into a prime (125802007) 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, 4838526 + ... + 4838551.

It is an arithmetic number, because the mean of its divisors is an integer number (33869773).

Almost surely, 2^125802001 is an apocalyptic number.

It is an amenable number.

125802001 is a deficient number, since it is larger than the sum of its proper divisors (9677091).

125802001 is an equidigital number, since it uses as much as digits as its factorization.

125802001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9677090.

The product of its (nonzero) digits is 160, while the sum is 19.

The square root of 125802001 is about 11216.1491163411. The cubic root of 125802001 is about 501.0670558304.

The spelling of 125802001 in words is "one hundred twenty-five million, eight hundred two thousand, one".