145259931 has 8 divisors (see below), whose sum is σ = 193740880. Its totient is φ = 96809472.

The previous prime is 145259923. The next prime is 145259957. The reversal of 145259931 is 139952541.

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

It is not a de Polignac number, because 145259931 - 2³ = 145259923 is a prime.

It is a super-2 number, since 2×145259931² = 42200895108249522, 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 145259931.

It is not an unprimeable number, because it can be changed into a prime (145259981) 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, 8175 + ... + 18903.

It is an arithmetic number, because the mean of its divisors is an integer number (24217610).

Almost surely, 2^145259931 is an apocalyptic number.

145259931 is a deficient number, since it is larger than the sum of its proper divisors (48480949).

145259931 is a wasteful number, since it uses less digits than its factorization.

145259931 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15245.

The product of its digits is 48600, while the sum is 39.

The square root of 145259931 is about 12052.3827934562. The cubic root of 145259931 is about 525.6725240710.

The spelling of 145259931 in words is "one hundred forty-five million, two hundred fifty-nine thousand, nine hundred thirty-one".