125213987 has 2 divisors, whose sum is σ = 125213988. Its totient is φ = 125213986.

The previous prime is 125213983. The next prime is 125214013. The reversal of 125213987 is 789312521.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 125213987 - 2² = 125213983 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 125213987.

It is not a weakly prime, because it can be changed into another prime (125213981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62606993 + 62606994.

It is an arithmetic number, because the mean of its divisors is an integer number (62606994).

Almost surely, 2^125213987 is an apocalyptic number.

125213987 is a deficient number, since it is larger than the sum of its proper divisors (1).

125213987 is an equidigital number, since it uses as much as digits as its factorization.

125213987 is an evil number, because the sum of its binary digits is even.

The product of its digits is 30240, while the sum is 38.

The square root of 125213987 is about 11189.9055849457. The cubic root of 125213987 is about 500.2851533442.

The spelling of 125213987 in words is "one hundred twenty-five million, two hundred thirteen thousand, nine hundred eighty-seven".