145707491 has 2 divisors, whose sum is σ = 145707492. Its totient is φ = 145707490.

The previous prime is 145707479. The next prime is 145707503. The reversal of 145707491 is 194707541.

It is a balanced prime because it is at equal distance from previous prime (145707479) and next prime (145707503).

It is a cyclic number.

It is not a de Polignac number, because 145707491 - 2⁶ = 145707427 is a prime.

It is not a weakly prime, because it can be changed into another prime (145704491) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72853745 + 72853746.

It is an arithmetic number, because the mean of its divisors is an integer number (72853746).

Almost surely, 2^145707491 is an apocalyptic number.

145707491 is a deficient number, since it is larger than the sum of its proper divisors (1).

145707491 is an equidigital number, since it uses as much as digits as its factorization.

145707491 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 35280, while the sum is 38.

The square root of 145707491 is about 12070.9357963664. The cubic root of 145707491 is about 526.2118532953.

Subtracting 145707491 from its reverse (194707541), we obtain a triangular number (49000050 = T₉₈₉₉).

The spelling of 145707491 in words is "one hundred forty-five million, seven hundred seven thousand, four hundred ninety-one".