1461251720 has 32 divisors (see below), whose sum is σ = 3300937920. Its totient is φ = 582168000.

The previous prime is 1461251707. The next prime is 1461251723. The reversal of 1461251720 is 271521641.

It is not an unprimeable number, because it can be changed into a prime (1461251723) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 62732 + ... + 82811.

It is an arithmetic number, because the mean of its divisors is an integer number (103154310).

Almost surely, 2^1461251720 is an apocalyptic number.

1461251720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1461251720 is an abundant number, since it is smaller than the sum of its proper divisors (1839686200).

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

1461251720 is a wasteful number, since it uses less digits than its factorization.

1461251720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 145805 (or 145801 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 29.

The square root of 1461251720 is about 38226.3223446881. The cubic root of 1461251720 is about 1134.7713046828.

The spelling of 1461251720 in words is "one billion, four hundred sixty-one million, two hundred fifty-one thousand, seven hundred twenty".