91245605 has 8 divisors (see below), whose sum is σ = 119448864. Its totient is φ = 66360400.

The previous prime is 91245599. The next prime is 91245611. The reversal of 91245605 is 50654219.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (91245599) and next prime (91245611).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 91245605 - 2¹² = 91241509 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 829451 + ... + 829560.

It is an arithmetic number, because the mean of its divisors is an integer number (14931108).

Almost surely, 2^91245605 is an apocalyptic number.

It is an amenable number.

91245605 is a deficient number, since it is larger than the sum of its proper divisors (28203259).

91245605 is a wasteful number, since it uses less digits than its factorization.

91245605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1659027.

The product of its (nonzero) digits is 10800, while the sum is 32.

The square root of 91245605 is about 9552.2565396874. The cubic root of 91245605 is about 450.1984392292.

It can be divided in two parts, 912 and 45605, that multiplied together give a triangular number (41591760 = T₉₁₂₀).

The spelling of 91245605 in words is "ninety-one million, two hundred forty-five thousand, six hundred five".