101451440 has 20 divisors (see below), whose sum is σ = 235874784. Its totient is φ = 40580544.

The previous prime is 101451433. The next prime is 101451451. The reversal of 101451440 is 44154101.

It is a tau number, because it is divible by the number of its divisors (20).

It is a Harshad number since it is a multiple of its sum of digits (20).

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, 633992 + ... + 634151.

Almost surely, 2^101451440 is an apocalyptic number.

101451440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

101451440 is an abundant number, since it is smaller than the sum of its proper divisors (134423344).

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

101451440 is a wasteful number, since it uses less digits than its factorization.

101451440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1268156 (or 1268150 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 20.

The square root of 101451440 is about 10072.3105591518. The cubic root of 101451440 is about 466.3937678821.

The spelling of 101451440 in words is "one hundred one million, four hundred fifty-one thousand, four hundred forty".