1451220240 has 40 divisors (see below), whose sum is σ = 4498783488. Its totient is φ = 386992000.

The previous prime is 1451220139. The next prime is 1451220257. The reversal of 1451220240 is 420221541.

It is a tau number, because it is divible by the number of its divisors (40).

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, 3023136 + ... + 3023615.

Almost surely, 2^1451220240 is an apocalyptic number.

1451220240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1451220240 is an abundant number, since it is smaller than the sum of its proper divisors (3047563248).

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

1451220240 is a wasteful number, since it uses less digits than its factorization.

1451220240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6046767 (or 6046761 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 21.

The square root of 1451220240 is about 38094.8846959799. The cubic root of 1451220240 is about 1132.1686081139.

Adding to 1451220240 its reverse (420221541), we get a palindrome (1871441781).

The spelling of 1451220240 in words is "one billion, four hundred fifty-one million, two hundred twenty thousand, two hundred forty".