145641090 has 32 divisors (see below), whose sum is σ = 399473280. Its totient is φ = 33289344.

The previous prime is 145641071. The next prime is 145641101. The reversal of 145641090 is 90146541.

It is a happy number.

It is a super-2 number, since 2×145641090² = 42422654192776200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 346555 + ... + 346974.

It is an arithmetic number, because the mean of its divisors is an integer number (12483540).

Almost surely, 2^145641090 is an apocalyptic number.

145641090 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

145641090 is an abundant number, since it is smaller than the sum of its proper divisors (253832190).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

145641090 is a wasteful number, since it uses less digits than its factorization.

145641090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 693546.

The product of its (nonzero) digits is 4320, while the sum is 30.

The square root of 145641090 is about 12068.1850333843. The cubic root of 145641090 is about 526.1319070457.

The spelling of 145641090 in words is "one hundred forty-five million, six hundred forty-one thousand, ninety".