125291001 has 8 divisors (see below), whose sum is σ = 182241504. Its totient is φ = 75933920.

The previous prime is 125290999. The next prime is 125291009. The reversal of 125291001 is 100192521.

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

It is a cyclic number.

It is not a de Polignac number, because 125291001 - 2¹ = 125290999 is a prime.

It is not an unprimeable number, because it can be changed into a prime (125291009) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1898316 + ... + 1898381.

It is an arithmetic number, because the mean of its divisors is an integer number (22780188).

Almost surely, 2^125291001 is an apocalyptic number.

125291001 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

125291001 is a deficient number, since it is larger than the sum of its proper divisors (56950503).

125291001 is a wasteful number, since it uses less digits than its factorization.

125291001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3796711.

The product of its (nonzero) digits is 180, while the sum is 21.

The square root of 125291001 is about 11193.3462825019. The cubic root of 125291001 is about 500.3877006321.

It can be divided in two parts, 12529 and 1001, that added together give a triangular number (13530 = T₁₆₄).

The spelling of 125291001 in words is "one hundred twenty-five million, two hundred ninety-one thousand, one".