7154721 has 12 divisors (see below), whose sum is σ = 11811072. Its totient is φ = 4088376.

The previous prime is 7154717. The next prime is 7154723. The reversal of 7154721 is 1274517.

It is not a de Polignac number, because 7154721 - 2² = 7154717 is a prime.

It is a Curzon number.

7154721 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (7154723) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 56721 + ... + 56846.

It is an arithmetic number, because the mean of its divisors is an integer number (984256).

Almost surely, 2^7154721 is an apocalyptic number.

It is an amenable number.

7154721 is a deficient number, since it is larger than the sum of its proper divisors (4656351).

7154721 is a wasteful number, since it uses less digits than its factorization.

7154721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 113580 (or 113577 counting only the distinct ones).

The product of its digits is 1960, while the sum is 27.

The square root of 7154721 is about 2674.8310227003. The cubic root of 7154721 is about 192.6922439966.

It can be divided in two parts, 7154 and 721, that added together give a triangular number (7875 = T₁₂₅).

The spelling of 7154721 in words is "seven million, one hundred fifty-four thousand, seven hundred twenty-one".