3501961 has 2 divisors, whose sum is σ = 3501962. Its totient is φ = 3501960.

The previous prime is 3501919. The next prime is 3501989. The reversal of 3501961 is 1691053.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2013561 + 1488400 = 1419^2 + 1220^2 .

It is a cyclic number.

It is not a de Polignac number, because 3501961 - 2¹¹ = 3499913 is a prime.

It is an Ulam number.

3501961 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (3504961) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1750980 + 1750981.

It is an arithmetic number, because the mean of its divisors is an integer number (1750981).

Almost surely, 2^3501961 is an apocalyptic number.

It is an amenable number.

3501961 is a deficient number, since it is larger than the sum of its proper divisors (1).

3501961 is an equidigital number, since it uses as much as digits as its factorization.

3501961 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 810, while the sum is 25.

The square root of 3501961 is about 1871.3527192916. The cubic root of 3501961 is about 151.8577992566.

The spelling of 3501961 in words is "three million, five hundred one thousand, nine hundred sixty-one".