145260247 has 4 divisors (see below), whose sum is σ = 158465736. Its totient is φ = 132054760.

The previous prime is 145260239. The next prime is 145260277. The reversal of 145260247 is 742062541.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 145260247 - 2³ = 145260239 is a prime.

It is a super-2 number, since 2×145260247² = 42201078717002018, which contains 22 as substring.

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 a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145260277) 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, 6602728 + ... + 6602749.

It is an arithmetic number, because the mean of its divisors is an integer number (39616434).

Almost surely, 2^145260247 is an apocalyptic number.

145260247 is a deficient number, since it is larger than the sum of its proper divisors (13205489).

145260247 is a wasteful number, since it uses less digits than its factorization.

145260247 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13205488.

The product of its (nonzero) digits is 13440, while the sum is 31.

The square root of 145260247 is about 12052.3959028900. The cubic root of 145260247 is about 525.6729052553.

The spelling of 145260247 in words is "one hundred forty-five million, two hundred sixty thousand, two hundred forty-seven".