107451721 has 6 divisors (see below), whose sum is σ = 116353230. Its totient is φ = 99186048.

The previous prime is 107451691. The next prime is 107451727. The reversal of 107451721 is 127154701.

It can be written as a sum of positive squares in 3 ways, for example, as 18496 + 107433225 = 136^2 + 10365^2 .

It is not a de Polignac number, because 107451721 - 2⁵ = 107451689 is a prime.

It is a super-4 number, since 4×107451721⁴ (a number of 33 digits) contains 4444 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 107451721.

It is not an unprimeable number, because it can be changed into a prime (107451727) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 317736 + ... + 318073.

It is an arithmetic number, because the mean of its divisors is an integer number (19392205).

Almost surely, 2^107451721 is an apocalyptic number.

It is an amenable number.

107451721 is a deficient number, since it is larger than the sum of its proper divisors (8901509).

107451721 is an equidigital number, since it uses as much as digits as its factorization.

107451721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 635835 (or 635822 counting only the distinct ones).

The product of its (nonzero) digits is 1960, while the sum is 28.

The square root of 107451721 is about 10365.8921950790. The cubic root of 107451721 is about 475.4130788932.

The spelling of 107451721 in words is "one hundred seven million, four hundred fifty-one thousand, seven hundred twenty-one".