125739966 has 32 divisors (see below), whose sum is σ = 275083776. Its totient is φ = 38000000.

The previous prime is 125739953. The next prime is 125739979. The reversal of 125739966 is 669937521.

It is an interprime number because it is at equal distance from previous prime (125739953) and next prime (125739979).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24091 + ... + 28841.

It is an arithmetic number, because the mean of its divisors is an integer number (8596368).

Almost surely, 2^125739966 is an apocalyptic number.

125739966 is an abundant number, since it is smaller than the sum of its proper divisors (149343810).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

125739966 is a wasteful number, since it uses less digits than its factorization.

125739966 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5168.

The product of its digits is 612360, while the sum is 48.

The square root of 125739966 is about 11213.3833431307. The cubic root of 125739966 is about 500.9846808675.

The spelling of 125739966 in words is "one hundred twenty-five million, seven hundred thirty-nine thousand, nine hundred sixty-six".