451121520 has 80 divisors (see below), whose sum is σ = 1480753440. Its totient is φ = 113221632.

The previous prime is 451121507. The next prime is 451121543. The reversal of 451121520 is 25121154.

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

It is a super-2 number, since 2×451121520² = 407021251614220800, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 51205 + ... + 59364.

It is an arithmetic number, because the mean of its divisors is an integer number (18509418).

Almost surely, 2^451121520 is an apocalyptic number.

451121520 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

451121520 is an abundant number, since it is smaller than the sum of its proper divisors (1029631920).

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

451121520 is a wasteful number, since it uses less digits than its factorization.

451121520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110602 (or 110596 counting only the distinct ones).

The product of its (nonzero) digits is 400, while the sum is 21.

The square root of 451121520 is about 21239.6214655535. The cubic root of 451121520 is about 766.9455200707.

Adding to 451121520 its reverse (25121154), we get a palindrome (476242674).

The spelling of 451121520 in words is "four hundred fifty-one million, one hundred twenty-one thousand, five hundred twenty".