2401621 has 2 divisors, whose sum is σ = 2401622. Its totient is φ = 2401620.

The previous prime is 2401603. The next prime is 2401639. The reversal of 2401621 is 1261042.

It is a balanced prime because it is at equal distance from previous prime (2401603) and next prime (2401639).

It can be written as a sum of positive squares in only one way, i.e., 1822500 + 579121 = 1350^2 + 761^2 .

It is a cyclic number.

It is not a de Polignac number, because 2401621 - 2¹⁵ = 2368853 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2401595 and 2401604.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2405621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1200810 + 1200811.

It is an arithmetic number, because the mean of its divisors is an integer number (1200811).

2^2401621 is an apocalyptic number.

It is an amenable number.

2401621 is a deficient number, since it is larger than the sum of its proper divisors (1).

2401621 is an equidigital number, since it uses as much as digits as its factorization.

2401621 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 2401621 is about 1549.7164256728. The cubic root of 2401621 is about 133.9167263107.

Adding to 2401621 its reverse (1261042), we get a palindrome (3662663).

The spelling of 2401621 in words is "two million, four hundred one thousand, six hundred twenty-one".