125541021 has 8 divisors (see below), whose sum is σ = 168006784. Its totient is φ = 83384640.

The previous prime is 125541019. The next prime is 125541023. The reversal of 125541021 is 120145521.

It is an interprime number because it is at equal distance from previous prime (125541019) and next prime (125541023).

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

It is not a de Polignac number, because 125541021 - 2¹ = 125541019 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125541023) 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, 76396 + ... + 78021.

It is an arithmetic number, because the mean of its divisors is an integer number (21000848).

Almost surely, 2^125541021 is an apocalyptic number.

It is an amenable number.

125541021 is a deficient number, since it is larger than the sum of its proper divisors (42465763).

125541021 is a wasteful number, since it uses less digits than its factorization.

125541021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 154691.

The product of its (nonzero) digits is 400, while the sum is 21.

The square root of 125541021 is about 11204.5089584506. The cubic root of 125541021 is about 500.7203231043.

Adding to 125541021 its reverse (120145521), we get a palindrome (245686542).

The spelling of 125541021 in words is "one hundred twenty-five million, five hundred forty-one thousand, twenty-one".