145903481 has 2 divisors, whose sum is σ = 145903482. Its totient is φ = 145903480.

The previous prime is 145903447. The next prime is 145903523. The reversal of 145903481 is 184309541.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 141967225 + 3936256 = 11915^2 + 1984^2 .

It is a cyclic number.

It is not a de Polignac number, because 145903481 - 2¹⁴ = 145887097 is a prime.

It is a super-2 number, since 2×145903481² = 42575651535834722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (145903781) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72951740 + 72951741.

It is an arithmetic number, because the mean of its divisors is an integer number (72951741).

Almost surely, 2^145903481 is an apocalyptic number.

It is an amenable number.

145903481 is a deficient number, since it is larger than the sum of its proper divisors (1).

145903481 is an equidigital number, since it uses as much as digits as its factorization.

145903481 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 17280, while the sum is 35.

The square root of 145903481 is about 12079.0513286433. The cubic root of 145903481 is about 526.4476820646.

The spelling of 145903481 in words is "one hundred forty-five million, nine hundred three thousand, four hundred eighty-one".