2361721 has 2 divisors, whose sum is σ = 2361722. Its totient is φ = 2361720.

The previous prime is 2361713. The next prime is 2361727. The reversal of 2361721 is 1271632.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1290496 + 1071225 = 1136^2 + 1035^2 .

It is a cyclic number.

It is not a de Polignac number, because 2361721 - 2³ = 2361713 is a prime.

It is a super-4 number, since 4×2361721⁴ (a number of 27 digits) contains 4444 as substring.

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 2361692 and 2361701.

It is not a weakly prime, because it can be changed into another prime (2361727) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1180860 + 1180861.

It is an arithmetic number, because the mean of its divisors is an integer number (1180861).

2^2361721 is an apocalyptic number.

It is an amenable number.

2361721 is a deficient number, since it is larger than the sum of its proper divisors (1).

2361721 is an equidigital number, since it uses as much as digits as its factorization.

2361721 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 504, while the sum is 22.

The square root of 2361721 is about 1536.7891852821. The cubic root of 2361721 is about 133.1709599809.

The spelling of 2361721 in words is "two million, three hundred sixty-one thousand, seven hundred twenty-one".