7528925421 has 12 divisors (see below), whose sum is σ = 10926658080. Its totient is φ = 4995494280.

The previous prime is 7528925419. The next prime is 7528925447. The reversal of 7528925421 is 1245298257.

It is not a de Polignac number, because 7528925421 - 2¹ = 7528925419 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7528925021) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1980441 + ... + 1984238.

It is an arithmetic number, because the mean of its divisors is an integer number (910554840).

Almost surely, 2^7528925421 is an apocalyptic number.

It is an amenable number.

7528925421 is a deficient number, since it is larger than the sum of its proper divisors (3397732659).

7528925421 is a wasteful number, since it uses less digits than its factorization.

7528925421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3964896 (or 3964893 counting only the distinct ones).

The product of its digits is 403200, while the sum is 45.

The square root of 7528925421 is about 86769.3806650710. The cubic root of 7528925421 is about 1959.9470189934.

The spelling of 7528925421 in words is "seven billion, five hundred twenty-eight million, nine hundred twenty-five thousand, four hundred twenty-one".