145360921 has 2 divisors, whose sum is σ = 145360922. Its totient is φ = 145360920.

The previous prime is 145360903. The next prime is 145360933. The reversal of 145360921 is 129063541.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 124099600 + 21261321 = 11140^2 + 4611^2 .

It is a cyclic number.

It is not a de Polignac number, because 145360921 - 2⁷ = 145360793 is a prime.

It is a super-2 number, since 2×145360921² = 42259594707936482, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (145360951) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72680460 + 72680461.

It is an arithmetic number, because the mean of its divisors is an integer number (72680461).

Almost surely, 2^145360921 is an apocalyptic number.

It is an amenable number.

145360921 is a deficient number, since it is larger than the sum of its proper divisors (1).

145360921 is an equidigital number, since it uses as much as digits as its factorization.

145360921 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6480, while the sum is 31.

The square root of 145360921 is about 12056.5716934790. The cubic root of 145360921 is about 525.7943180849.

The spelling of 145360921 in words is "one hundred forty-five million, three hundred sixty thousand, nine hundred twenty-one".