145031420 has 24 divisors (see below), whose sum is σ = 322482384. Its totient is φ = 54599936.

The previous prime is 145031417. The next prime is 145031431. The reversal of 145031420 is 24130541.

It is a super-2 number, since 2×145031420² = 42068225574432800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 145031392 and 145031401.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 212942 + ... + 213621.

It is an arithmetic number, because the mean of its divisors is an integer number (13436766).

Almost surely, 2^145031420 is an apocalyptic number.

145031420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

145031420 is an abundant number, since it is smaller than the sum of its proper divisors (177450964).

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

145031420 is a wasteful number, since it uses less digits than its factorization.

145031420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 426589 (or 426587 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 145031420 is about 12042.8991526127. The cubic root of 145031420 is about 525.3967311136.

Adding to 145031420 its reverse (24130541), we get a palindrome (169161961).

The spelling of 145031420 in words is "one hundred forty-five million, thirty-one thousand, four hundred twenty".