145064491 has 16 divisors (see below), whose sum is σ = 170845920. Its totient is φ = 121432320.

The previous prime is 145064489. The next prime is 145064533. The reversal of 145064491 is 194460541.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 145064491 - 2¹ = 145064489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (145064471) 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 15 ways as a sum of consecutive naturals, for example, 71791 + ... + 73783.

It is an arithmetic number, because the mean of its divisors is an integer number (10677870).

Almost surely, 2^145064491 is an apocalyptic number.

145064491 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

145064491 is a deficient number, since it is larger than the sum of its proper divisors (25781429).

145064491 is a wasteful number, since it uses less digits than its factorization.

145064491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2526.

The product of its (nonzero) digits is 17280, while the sum is 34.

The square root of 145064491 is about 12044.2721241261. The cubic root of 145064491 is about 525.4366628626.

The spelling of 145064491 in words is "one hundred forty-five million, sixty-four thousand, four hundred ninety-one".