1451005020 has 72 divisors (see below), whose sum is σ = 4409727504. Its totient is φ = 386201088.

The previous prime is 1451004983. The next prime is 1451005093. The reversal of 1451005020 is 205001541.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 1451004984 and 1451005002.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 91092 + ... + 105828.

Almost surely, 2^1451005020 is an apocalyptic number.

1451005020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1451005020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2204863752).

1451005020 is an abundant number, since it is smaller than the sum of its proper divisors (2958722484).

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

1451005020 is a wasteful number, since it uses less digits than its factorization.

1451005020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15299 (or 15294 counting only the distinct ones).

The product of its (nonzero) digits is 200, while the sum is 18.

The square root of 1451005020 is about 38092.0598025363. The cubic root of 1451005020 is about 1132.1126374286.

Adding to 1451005020 its reverse (205001541), we get a palindrome (1656006561).

The spelling of 1451005020 in words is "one billion, four hundred fifty-one million, five thousand, twenty".