145541690 has 16 divisors (see below), whose sum is σ = 299400192. Its totient is φ = 49899984.

The previous prime is 145541663. The next prime is 145541701. The reversal of 145541690 is 96145541.

It is a super-2 number, since 2×145541690² = 42364767056112200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 145541690.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1039514 + ... + 1039653.

It is an arithmetic number, because the mean of its divisors is an integer number (18712512).

Almost surely, 2^145541690 is an apocalyptic number.

145541690 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

145541690 is an abundant number, since it is smaller than the sum of its proper divisors (153858502).

145541690 is a wasteful number, since it uses less digits than its factorization.

145541690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2079181.

The product of its (nonzero) digits is 21600, while the sum is 35.

The square root of 145541690 is about 12064.0660641427. The cubic root of 145541690 is about 526.0121848488.

The spelling of 145541690 in words is "one hundred forty-five million, five hundred forty-one thousand, six hundred ninety".