125901778 has 4 divisors (see below), whose sum is σ = 188852670. Its totient is φ = 62950888.

The previous prime is 125901773. The next prime is 125901781. The reversal of 125901778 is 877109521.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 877109521 = 19 ⋅46163659.

It can be written as a sum of positive squares in only one way, i.e., 99141849 + 26759929 = 9957^2 + 5173^2 .

It is a super-2 number, since 2×125901778² = 31702515407122568, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 125901778.

It is not an unprimeable number, because it can be changed into a prime (125901773) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31475443 + ... + 31475446.

Almost surely, 2^125901778 is an apocalyptic number.

125901778 is a deficient number, since it is larger than the sum of its proper divisors (62950892).

125901778 is an equidigital number, since it uses as much as digits as its factorization.

125901778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62950891.

The product of its (nonzero) digits is 35280, while the sum is 40.

The square root of 125901778 is about 11220.5961517203. The cubic root of 125901778 is about 501.1994908092.

The spelling of 125901778 in words is "one hundred twenty-five million, nine hundred one thousand, seven hundred seventy-eight".