145259501 has 4 divisors (see below), whose sum is σ = 145505052. Its totient is φ = 145013952.

The previous prime is 145259479. The next prime is 145259507. The reversal of 145259501 is 105952541.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 105952541 = 6911 ⋅15331.

It can be written as a sum of positive squares in 2 ways, for example, as 42237001 + 103022500 = 6499^2 + 10150^2 .

It is a cyclic number.

It is not a de Polignac number, because 145259501 - 2⁶ = 145259437 is a prime.

It is a super-2 number, since 2×145259501² = 42200645261538002, 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 (145259507) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 121886 + ... + 123071.

It is an arithmetic number, because the mean of its divisors is an integer number (36376263).

Almost surely, 2^145259501 is an apocalyptic number.

It is an amenable number.

145259501 is a deficient number, since it is larger than the sum of its proper divisors (245551).

145259501 is an equidigital number, since it uses as much as digits as its factorization.

145259501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 245550.

The product of its (nonzero) digits is 9000, while the sum is 32.

The square root of 145259501 is about 12052.3649546469. The cubic root of 145259501 is about 525.6720053701.

The spelling of 145259501 in words is "one hundred forty-five million, two hundred fifty-nine thousand, five hundred one".