145247761 has 8 divisors (see below), whose sum is σ = 153274400. Its totient is φ = 137259360.

The previous prime is 145247701. The next prime is 145247777. The reversal of 145247761 is 167742541.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-145247761 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 145247761.

It is not an unprimeable number, because it can be changed into a prime (145247701) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1575 + ... + 17116.

It is an arithmetic number, because the mean of its divisors is an integer number (19159300).

Almost surely, 2^145247761 is an apocalyptic number.

It is an amenable number.

145247761 is a deficient number, since it is larger than the sum of its proper divisors (8026639).

145247761 is a wasteful number, since it uses less digits than its factorization.

145247761 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19119.

The product of its digits is 47040, while the sum is 37.

The square root of 145247761 is about 12051.8779034638. The cubic root of 145247761 is about 525.6578432313.

The spelling of 145247761 in words is "one hundred forty-five million, two hundred forty-seven thousand, seven hundred sixty-one".