145304621 has 16 divisors (see below), whose sum is σ = 183459840. Its totient is φ = 111786480.

The previous prime is 145304617. The next prime is 145304629. The reversal of 145304621 is 126403541.

It is a cyclic number.

It is not a de Polignac number, because 145304621 - 2² = 145304617 is a prime.

It is a super-2 number, since 2×145304621² = 42226865767907282, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145304629) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5861 + ... + 18026.

It is an arithmetic number, because the mean of its divisors is an integer number (11466240).

Almost surely, 2^145304621 is an apocalyptic number.

145304621 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

145304621 is a deficient number, since it is larger than the sum of its proper divisors (38155219).

145304621 is a wasteful number, since it uses less digits than its factorization.

145304621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23984.

The product of its (nonzero) digits is 2880, while the sum is 26.

The square root of 145304621 is about 12054.2366411150. The cubic root of 145304621 is about 525.7264272045.

The spelling of 145304621 in words is "one hundred forty-five million, three hundred four thousand, six hundred twenty-one".