145142420 has 24 divisors (see below), whose sum is σ = 318052224. Its totient is φ = 55532576.

The previous prime is 145142411. The next prime is 145142479. The reversal of 145142420 is 24241541.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 157304 + ... + 158223.

It is an arithmetic number, because the mean of its divisors is an integer number (13252176).

Almost surely, 2^145142420 is an apocalyptic number.

145142420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

145142420 is an abundant number, since it is smaller than the sum of its proper divisors (172909804).

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

145142420 is a wasteful number, since it uses less digits than its factorization.

145142420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 315559 (or 315557 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 23.

The square root of 145142420 is about 12047.5067960139. The cubic root of 145142420 is about 525.5307346403.

Adding to 145142420 its reverse (24241541), we get a palindrome (169383961).

The spelling of 145142420 in words is "one hundred forty-five million, one hundred forty-two thousand, four hundred twenty".