145403454 has 64 divisors (see below), whose sum is σ = 345526272. Its totient is φ = 39916800.

The previous prime is 145403449. The next prime is 145403459. The reversal of 145403454 is 454304541.

It is an interprime number because it is at equal distance from previous prime (145403449) and next prime (145403459).

It is a super-2 number, since 2×145403454² = 42284328870260232, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145403459) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 235354 + ... + 235970.

It is an arithmetic number, because the mean of its divisors is an integer number (5398848).

Almost surely, 2^145403454 is an apocalyptic number.

145403454 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 145403454, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (172763136).

145403454 is an abundant number, since it is smaller than the sum of its proper divisors (200122818).

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

145403454 is a wasteful number, since it uses less digits than its factorization.

145403454 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 841.

The product of its (nonzero) digits is 19200, while the sum is 30.

The square root of 145403454 is about 12058.3354572677. The cubic root of 145403454 is about 525.8455960320.

Adding to 145403454 its reverse (454304541), we get a palindrome (599707995).

The spelling of 145403454 in words is "one hundred forty-five million, four hundred three thousand, four hundred fifty-four".