145138434 has 32 divisors (see below), whose sum is σ = 332159616. Its totient is φ = 41416320.

The previous prime is 145138423. The next prime is 145138439. The reversal of 145138434 is 434831541.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 145138395 and 145138404.

It is not an unprimeable number, because it can be changed into a prime (145138439) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 42934 + ... + 46190.

It is an arithmetic number, because the mean of its divisors is an integer number (10379988).

Almost surely, 2^145138434 is an apocalyptic number.

145138434 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

145138434 is an abundant number, since it is smaller than the sum of its proper divisors (187021182).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

145138434 is a wasteful number, since it uses less digits than its factorization.

145138434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4330.

The product of its digits is 23040, while the sum is 33.

The square root of 145138434 is about 12047.3413664592. The cubic root of 145138434 is about 525.5259237686.

Adding to 145138434 its reverse (434831541), we get a palindrome (579969975).

The spelling of 145138434 in words is "one hundred forty-five million, one hundred thirty-eight thousand, four hundred thirty-four".