125421641 has 8 divisors (see below), whose sum is σ = 132220800. Its totient is φ = 118642320.

The previous prime is 125421617. The next prime is 125421643. The reversal of 125421641 is 146124521.

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 125421641 - 2¹⁸ = 125159497 is a prime.

It is a super-2 number, since 2×125421641² = 31461176062265762, 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 125421641.

It is not an unprimeable number, because it can be changed into a prime (125421643) 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, 9071 + ... + 18251.

It is an arithmetic number, because the mean of its divisors is an integer number (16527600).

Almost surely, 2^125421641 is an apocalyptic number.

It is an amenable number.

125421641 is a deficient number, since it is larger than the sum of its proper divisors (6799159).

125421641 is an equidigital number, since it uses as much as digits as its factorization.

125421641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9919.

The product of its digits is 1920, while the sum is 26.

The square root of 125421641 is about 11199.1803717951. The cubic root of 125421641 is about 500.5615570712.

The spelling of 125421641 in words is "one hundred twenty-five million, four hundred twenty-one thousand, six hundred forty-one".