101125399 has 4 divisors (see below), whose sum is σ = 101165464. Its totient is φ = 101085336.

The previous prime is 101125397. The next prime is 101125433. The reversal of 101125399 is 993521101.

It is a happy number.

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 101125399 - 2¹ = 101125397 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 101125399.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (101125397) 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, 15972 + ... + 21385.

It is an arithmetic number, because the mean of its divisors is an integer number (25291366).

Almost surely, 2^101125399 is an apocalyptic number.

101125399 is a deficient number, since it is larger than the sum of its proper divisors (40065).

101125399 is an equidigital number, since it uses as much as digits as its factorization.

101125399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40064.

The product of its (nonzero) digits is 2430, while the sum is 31.

The square root of 101125399 is about 10056.1125192591. The cubic root of 101125399 is about 465.8936051748.

The spelling of 101125399 in words is "one hundred one million, one hundred twenty-five thousand, three hundred ninety-nine".