145697501 has 2 divisors, whose sum is σ = 145697502. Its totient is φ = 145697500.

The previous prime is 145697483. The next prime is 145697533. The reversal of 145697501 is 105796541.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 124858276 + 20839225 = 11174^2 + 4565^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-145697501 is a prime.

It is a Chen prime.

It is equal to p_8215697 and since 145697501 and 8215697 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (145697401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72848750 + 72848751.

It is an arithmetic number, because the mean of its divisors is an integer number (72848751).

Almost surely, 2^145697501 is an apocalyptic number.

It is an amenable number.

145697501 is a deficient number, since it is larger than the sum of its proper divisors (1).

145697501 is an equidigital number, since it uses as much as digits as its factorization.

145697501 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 37800, while the sum is 38.

The square root of 145697501 is about 12070.5219853990. The cubic root of 145697501 is about 526.1998269711.

The spelling of 145697501 in words is "one hundred forty-five million, six hundred ninety-seven thousand, five hundred one".