145622590 has 16 divisors (see below), whose sum is σ = 265712688. Its totient is φ = 57450816.

The previous prime is 145622579. The next prime is 145622599. The reversal of 145622590 is 95226541.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145622599) 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, 99012 + ... + 100471.

It is an arithmetic number, because the mean of its divisors is an integer number (16607043).

Almost surely, 2^145622590 is an apocalyptic number.

145622590 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

145622590 is a deficient number, since it is larger than the sum of its proper divisors (120090098).

145622590 is a wasteful number, since it uses less digits than its factorization.

145622590 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 199563.

The product of its (nonzero) digits is 21600, while the sum is 34.

The square root of 145622590 is about 12067.4185309038. The cubic root of 145622590 is about 526.1096288722.

The spelling of 145622590 in words is "one hundred forty-five million, six hundred twenty-two thousand, five hundred ninety".