125653643 has 4 divisors (see below), whose sum is σ = 128718408. Its totient is φ = 122588880.

The previous prime is 125653621. The next prime is 125653651. The reversal of 125653643 is 346356521.

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 125653643 - 2¹⁶ = 125588107 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (125659643) 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, 1532321 + ... + 1532402.

It is an arithmetic number, because the mean of its divisors is an integer number (32179602).

Almost surely, 2^125653643 is an apocalyptic number.

125653643 is a deficient number, since it is larger than the sum of its proper divisors (3064765).

125653643 is an equidigital number, since it uses as much as digits as its factorization.

125653643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3064764.

The product of its digits is 64800, while the sum is 35.

The square root of 125653643 is about 11209.5335763804. The cubic root of 125653643 is about 500.8700092896.

The spelling of 125653643 in words is "one hundred twenty-five million, six hundred fifty-three thousand, six hundred forty-three".