145061261 has 4 divisors (see below), whose sum is σ = 145090812. Its totient is φ = 145031712.

The previous prime is 145061251. The next prime is 145061303. The reversal of 145061261 is 162160541.

145061261 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 162160541 = 331 ⋅489911.

It can be written as a sum of positive squares in 2 ways, for example, as 48038761 + 97022500 = 6931^2 + 9850^2 .

It is a cyclic number.

It is not a de Polignac number, because 145061261 - 2⁶ = 145061197 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 145061261.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145061251) 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, 5450 + ... + 17883.

It is an arithmetic number, because the mean of its divisors is an integer number (36272703).

Almost surely, 2^145061261 is an apocalyptic number.

It is an amenable number.

145061261 is a deficient number, since it is larger than the sum of its proper divisors (29551).

145061261 is an equidigital number, since it uses as much as digits as its factorization.

145061261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29550.

The product of its (nonzero) digits is 1440, while the sum is 26.

The square root of 145061261 is about 12044.1380347454. The cubic root of 145061261 is about 525.4327630499.

The spelling of 145061261 in words is "one hundred forty-five million, sixty-one thousand, two hundred sixty-one".