4025426521 has 4 divisors (see below), whose sum is σ = 4027291444. Its totient is φ = 4023561600.

The previous prime is 4025426491. The next prime is 4025426527. The reversal of 4025426521 is 1256245204.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3287760921 + 737665600 = 57339^2 + 27160^2 .

It is a cyclic number.

It is not a de Polignac number, because 4025426521 - 2³¹ = 1877942873 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4025426527) 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, 929220 + ... + 933541.

It is an arithmetic number, because the mean of its divisors is an integer number (1006822861).

Almost surely, 2^4025426521 is an apocalyptic number.

It is an amenable number.

4025426521 is a deficient number, since it is larger than the sum of its proper divisors (1864923).

4025426521 is a wasteful number, since it uses less digits than its factorization.

4025426521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1864922.

The product of its (nonzero) digits is 19200, while the sum is 31.

The square root of 4025426521 is about 63446.2490695865. The cubic root of 4025426521 is about 1590.7574573550.

The spelling of 4025426521 in words is "four billion, twenty-five million, four hundred twenty-six thousand, five hundred twenty-one".