90254481 has 4 divisors (see below), whose sum is σ = 120339312. Its totient is φ = 60169652.

The previous prime is 90254477. The next prime is 90254497. The reversal of 90254481 is 18445209.

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, and also an emirpimes, since its reverse is a distinct semiprime: 18445209 = 3 ⋅6148403.

It is a cyclic number.

It is not a de Polignac number, because 90254481 - 2² = 90254477 is a prime.

It is a super-2 number, since 2×90254481² = 16291742681158722, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (90254431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15042411 + ... + 15042416.

It is an arithmetic number, because the mean of its divisors is an integer number (30084828).

Almost surely, 2^90254481 is an apocalyptic number.

It is an amenable number.

90254481 is a deficient number, since it is larger than the sum of its proper divisors (30084831).

90254481 is a wasteful number, since it uses less digits than its factorization.

90254481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30084830.

The product of its (nonzero) digits is 11520, while the sum is 33.

The square root of 90254481 is about 9500.2358391779. The cubic root of 90254481 is about 448.5624595312.

The spelling of 90254481 in words is "ninety million, two hundred fifty-four thousand, four hundred eighty-one".