90042045 has 16 divisors (see below), whose sum is σ = 151650240. Its totient is φ = 45494784.

The previous prime is 90042023. The next prime is 90042077. The reversal of 90042045 is 54024009.

It is not a de Polignac number, because 90042045 - 2⁶ = 90041981 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 157684 + ... + 158253.

It is an arithmetic number, because the mean of its divisors is an integer number (9478140).

Almost surely, 2^90042045 is an apocalyptic number.

90042045 is a gapful number since it is divisible by the number (95) formed by its first and last digit.

It is an amenable number.

90042045 is a deficient number, since it is larger than the sum of its proper divisors (61608195).

90042045 is a wasteful number, since it uses less digits than its factorization.

90042045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 315964.

The product of its (nonzero) digits is 1440, while the sum is 24.

The square root of 90042045 is about 9489.0486878296. The cubic root of 90042045 is about 448.2102492220.

The spelling of 90042045 in words is "ninety million, forty-two thousand, forty-five".