1451421040 has 80 divisors (see below), whose sum is σ = 3444743808. Its totient is φ = 568608768.

The previous prime is 1451421031. The next prime is 1451421043. The reversal of 1451421040 is 401241541.

It is a tau number, because it is divible by the number of its divisors (80).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1451421043) 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, 916089 + ... + 917671.

Almost surely, 2^1451421040 is an apocalyptic number.

1451421040 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 1451421040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1722371904).

1451421040 is an abundant number, since it is smaller than the sum of its proper divisors (1993322768).

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

1451421040 is a wasteful number, since it uses less digits than its factorization.

1451421040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1826 (or 1820 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 22.

The square root of 1451421040 is about 38097.5201292683. The cubic root of 1451421040 is about 1132.2208237059.

Adding to 1451421040 its reverse (401241541), we get a palindrome (1852662581).

The spelling of 1451421040 in words is "one billion, four hundred fifty-one million, four hundred twenty-one thousand, forty".