125437553 has 4 divisors (see below), whose sum is σ = 125544948. Its totient is φ = 125330160.

The previous prime is 125437547. The next prime is 125437589. The reversal of 125437553 is 355734521.

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

It can be written as a sum of positive squares in 2 ways, for example, as 70425664 + 55011889 = 8392^2 + 7417^2 .

It is a cyclic number.

It is not a de Polignac number, because 125437553 - 2⁶ = 125437489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (125437853) 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, 51926 + ... + 54287.

It is an arithmetic number, because the mean of its divisors is an integer number (31386237).

Almost surely, 2^125437553 is an apocalyptic number.

It is an amenable number.

125437553 is a deficient number, since it is larger than the sum of its proper divisors (107395).

125437553 is a wasteful number, since it uses less digits than its factorization.

125437553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 107394.

The product of its digits is 63000, while the sum is 35.

The square root of 125437553 is about 11199.8907583958. The cubic root of 125437553 is about 500.5827246002.

The spelling of 125437553 in words is "one hundred twenty-five million, four hundred thirty-seven thousand, five hundred fifty-three".