7125007859421 has 4 divisors (see below), whose sum is σ = 9500010479232. Its totient is φ = 4750005239612.

The previous prime is 7125007859401. The next prime is 7125007859503. The reversal of 7125007859421 is 1249587005217.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7125007859421 is a prime.

It is a super-2 number, since 2×7125007859421² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7125007859401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1187501309901 + ... + 1187501309906.

It is an arithmetic number, because the mean of its divisors is an integer number (2375002619808).

Almost surely, 2^{7125007859421} is an apocalyptic number.

It is an amenable number.

7125007859421 is a deficient number, since it is larger than the sum of its proper divisors (2375002619811).

7125007859421 is a wasteful number, since it uses less digits than its factorization.

7125007859421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2375002619810.

The product of its (nonzero) digits is 1411200, while the sum is 51.

The spelling of 7125007859421 in words is "seven trillion, one hundred twenty-five billion, seven million, eight hundred fifty-nine thousand, four hundred twenty-one".