145117469 has 8 divisors (see below), whose sum is σ = 169233600. Its totient is φ = 124386108.

The previous prime is 145117463. The next prime is 145117481. The reversal of 145117469 is 964711541.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-145117469 is a prime.

It is a super-2 number, since 2×145117469² = 42118159617931922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145117463) 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, 211199 + ... + 211884.

It is an arithmetic number, because the mean of its divisors is an integer number (21154200).

Almost surely, 2^145117469 is an apocalyptic number.

It is an amenable number.

145117469 is a deficient number, since it is larger than the sum of its proper divisors (24116131).

145117469 is an frugal number, since it uses more digits than its factorization.

145117469 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 423104 (or 423090 counting only the distinct ones).

The product of its digits is 30240, while the sum is 38.

The square root of 145117469 is about 12046.4712260479. The cubic root of 145117469 is about 525.5006187747.

The spelling of 145117469 in words is "one hundred forty-five million, one hundred seventeen thousand, four hundred sixty-nine".