1451021216 has 24 divisors (see below), whose sum is σ = 2948851584. Its totient is φ = 702106560.

The previous prime is 1451021191. The next prime is 1451021261. The reversal of 1451021216 is 6121201541.

It is a junction number, because it is equal to n+sod(n) for n = 1451021191 and 1451021200.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 730370 + ... + 732353.

It is an arithmetic number, because the mean of its divisors is an integer number (122868816).

Almost surely, 2^1451021216 is an apocalyptic number.

1451021216 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1451021216 is an abundant number, since it is smaller than the sum of its proper divisors (1497830368).

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

1451021216 is a wasteful number, since it uses less digits than its factorization.

1451021216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1462764 (or 1462756 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 23.

The square root of 1451021216 is about 38092.2723921795. The cubic root of 1451021216 is about 1132.1168495960.

Adding to 1451021216 its reverse (6121201541), we get a palindrome (7572222757).

The spelling of 1451021216 in words is "one billion, four hundred fifty-one million, twenty-one thousand, two hundred sixteen".