145256507 has 6 divisors (see below), whose sum is σ = 159662244. Its totient is φ = 132051260.

The previous prime is 145256497. The next prime is 145256521. The reversal of 145256507 is 705652541.

It is not a de Polignac number, because 145256507 - 2¹⁶ = 145190971 is a prime.

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 (145256567) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 600113 + ... + 600354.

It is an arithmetic number, because the mean of its divisors is an integer number (26610374).

Almost surely, 2^145256507 is an apocalyptic number.

145256507 is a deficient number, since it is larger than the sum of its proper divisors (14405737).

145256507 is a wasteful number, since it uses less digits than its factorization.

145256507 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1200489 (or 1200478 counting only the distinct ones).

The product of its (nonzero) digits is 42000, while the sum is 35.

The square root of 145256507 is about 12052.2407460190. The cubic root of 145256507 is about 525.6683937353.

It can be divided in two parts, 145 and 256507, that added together give a palindrome (256652).

The spelling of 145256507 in words is "one hundred forty-five million, two hundred fifty-six thousand, five hundred seven".