125321919 has 4 divisors (see below), whose sum is σ = 167095896. Its totient is φ = 83547944.

The previous prime is 125321897. The next prime is 125321939. The reversal of 125321919 is 919123521.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 919123521 = 3 ⋅306374507.

It is a cyclic number.

It is not a de Polignac number, because 125321919 - 2¹¹ = 125319871 is a prime.

It is a super-2 number, since 2×125321919² = 31411166763685122, 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 125321919.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125321939) 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, 20886984 + ... + 20886989.

It is an arithmetic number, because the mean of its divisors is an integer number (41773974).

Almost surely, 2^125321919 is an apocalyptic number.

125321919 is a deficient number, since it is larger than the sum of its proper divisors (41773977).

125321919 is an equidigital number, since it uses as much as digits as its factorization.

125321919 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41773976.

The product of its digits is 4860, while the sum is 33.

The square root of 125321919 is about 11194.7272856466. The cubic root of 125321919 is about 500.4288573908.

The spelling of 125321919 in words is "one hundred twenty-five million, three hundred twenty-one thousand, nine hundred nineteen".