145252061 has 4 divisors (see below), whose sum is σ = 151567392. Its totient is φ = 138936732.

The previous prime is 145252057. The next prime is 145252067. The reversal of 145252061 is 160252541.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 160252541 = 293 ⋅546937.

It is a cyclic number.

It is not a de Polignac number, because 145252061 - 2² = 145252057 is a prime.

It is a super-2 number, since 2×145252061² = 42196322449495442, which contains 22 as substring.

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 145252061.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145252067) 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, 3157631 + ... + 3157676.

It is an arithmetic number, because the mean of its divisors is an integer number (37891848).

Almost surely, 2^145252061 is an apocalyptic number.

It is an amenable number.

145252061 is a deficient number, since it is larger than the sum of its proper divisors (6315331).

145252061 is an equidigital number, since it uses as much as digits as its factorization.

145252061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6315330.

The product of its (nonzero) digits is 2400, while the sum is 26.

The square root of 145252061 is about 12052.0562975784. The cubic root of 145252061 is about 525.6630304746.

The spelling of 145252061 in words is "one hundred forty-five million, two hundred fifty-two thousand, sixty-one".