145250761 has 4 divisors (see below), whose sum is σ = 145383552. Its totient is φ = 145117972.

The previous prime is 145250753. The next prime is 145250783. The reversal of 145250761 is 167052541.

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.

It is a cyclic number.

It is not a de Polignac number, because 145250761 - 2³ = 145250753 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (145250701) 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, 64741 + ... + 66946.

It is an arithmetic number, because the mean of its divisors is an integer number (36345888).

Almost surely, 2^145250761 is an apocalyptic number.

It is an amenable number.

145250761 is a deficient number, since it is larger than the sum of its proper divisors (132791).

145250761 is a wasteful number, since it uses less digits than its factorization.

145250761 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 132790.

The product of its (nonzero) digits is 8400, while the sum is 31.

The square root of 145250761 is about 12052.0023647525. The cubic root of 145250761 is about 525.6614622491.

The spelling of 145250761 in words is "one hundred forty-five million, two hundred fifty thousand, seven hundred sixty-one".