42454542025 has 75 divisors (see below), whose sum is σ = 63607267571. Its totient is φ = 28107834720.

The previous prime is 42454542023. The next prime is 42454542029. The reversal of 42454542025 is 52024545424.

The square root of 42454542025 is 206045.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 7 ways, for example, as 25158083769 + 17296458256 = 158613^2 + 131516^2 .

It is not a de Polignac number, because 42454542025 - 2¹ = 42454542023 is a prime.

It is a super-2 number, since 2×42454542025² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42454542023) by changing a digit.

It is a polite number, since it can be written in 74 ways as a sum of consecutive naturals, for example, 1463949711 + ... + 1463949739.

Almost surely, 2^42454542025 is an apocalyptic number.

42454542025 is the 206045-th square number.

42454542025 is the 103023-rd centered octagonal number.

It is an amenable number.

42454542025 is a deficient number, since it is larger than the sum of its proper divisors (21152725546).

42454542025 is an frugal number, since it uses more digits than its factorization.

42454542025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 154 (or 41 counting only the distinct ones).

The product of its (nonzero) digits is 256000, while the sum is 37.

The spelling of 42454542025 in words is "forty-two billion, four hundred fifty-four million, five hundred forty-two thousand, twenty-five".