7257573421 has 16 divisors (see below), whose sum is σ = 8662942080. Its totient is φ = 5950048320.

The previous prime is 7257573409. The next prime is 7257573457. The reversal of 7257573421 is 1243757527.

7257573421 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 7257573421 - 2⁷ = 7257573293 is a prime.

It is a super-2 number, since 2×7257573421² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7257573721) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 222190 + ... + 252751.

It is an arithmetic number, because the mean of its divisors is an integer number (541433880).

Almost surely, 2^7257573421 is an apocalyptic number.

It is an amenable number.

7257573421 is a deficient number, since it is larger than the sum of its proper divisors (1405368659).

7257573421 is a wasteful number, since it uses less digits than its factorization.

7257573421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 475044.

The product of its digits is 411600, while the sum is 43.

The square root of 7257573421 is about 85191.3928809713. The cubic root of 7257573421 is about 1936.1120117279.

The spelling of 7257573421 in words is "seven billion, two hundred fifty-seven million, five hundred seventy-three thousand, four hundred twenty-one".