125661403 has 8 divisors (see below), whose sum is σ = 145967840. Its totient is φ = 105943680.

The previous prime is 125661377. The next prime is 125661449. The reversal of 125661403 is 304166521.

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 125661403 - 2¹⁷ = 125530331 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (125661493) 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, 146718 + ... + 147571.

It is an arithmetic number, because the mean of its divisors is an integer number (18245980).

Almost surely, 2^125661403 is an apocalyptic number.

125661403 is a deficient number, since it is larger than the sum of its proper divisors (20306437).

125661403 is an equidigital number, since it uses as much as digits as its factorization.

125661403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 294357.

The product of its (nonzero) digits is 4320, while the sum is 28.

The square root of 125661403 is about 11209.8797049745. The cubic root of 125661403 is about 500.8803198310.

The spelling of 125661403 in words is "one hundred twenty-five million, six hundred sixty-one thousand, four hundred three".