145399090 has 16 divisors (see below), whose sum is σ = 264166272. Its totient is φ = 57615664.

The previous prime is 145399081. The next prime is 145399099. The reversal of 145399090 is 90993541.

It is an interprime number because it is at equal distance from previous prime (145399081) and next prime (145399099).

It is a super-2 number, since 2×145399090² = 42281790745656200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (145399099) by changing a digit.

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, 66874 + ... + 69013.

It is an arithmetic number, because the mean of its divisors is an integer number (16510392).

Almost surely, 2^145399090 is an apocalyptic number.

145399090 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

145399090 is a deficient number, since it is larger than the sum of its proper divisors (118767182).

145399090 is a wasteful number, since it uses less digits than its factorization.

145399090 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 136001.

The product of its (nonzero) digits is 43740, while the sum is 40.

The square root of 145399090 is about 12058.1545022445. The cubic root of 145399090 is about 525.8403352373.

The spelling of 145399090 in words is "one hundred forty-five million, three hundred ninety-nine thousand, ninety".