125691351 has 4 divisors (see below), whose sum is σ = 167588472. Its totient is φ = 83794232.

The previous prime is 125691347. The next prime is 125691361. The reversal of 125691351 is 153196521.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 125691351 - 2² = 125691347 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125691311) 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, 20948556 + ... + 20948561.

It is an arithmetic number, because the mean of its divisors is an integer number (41897118).

Almost surely, 2^125691351 is an apocalyptic number.

125691351 is a deficient number, since it is larger than the sum of its proper divisors (41897121).

125691351 is an equidigital number, since it uses as much as digits as its factorization.

125691351 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41897120.

The product of its digits is 8100, while the sum is 33.

The square root of 125691351 is about 11211.2154113637. The cubic root of 125691351 is about 500.9201071006.

The spelling of 125691351 in words is "one hundred twenty-five million, six hundred ninety-one thousand, three hundred fifty-one".