3121487 has 2 divisors, whose sum is σ = 3121488. Its totient is φ = 3121486.

The previous prime is 3121457. The next prime is 3121493. The reversal of 3121487 is 7841213.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 3121487 - 2⁶ = 3121423 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3121427) 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, 1560743 + 1560744.

It is an arithmetic number, because the mean of its divisors is an integer number (1560744).

Almost surely, 2^3121487 is an apocalyptic number.

3121487 is a deficient number, since it is larger than the sum of its proper divisors (1).

3121487 is an equidigital number, since it uses as much as digits as its factorization.

3121487 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1344, while the sum is 26.

The square root of 3121487 is about 1766.7730471116. The cubic root of 3121487 is about 146.1460819727.

The spelling of 3121487 in words is "three million, one hundred twenty-one thousand, four hundred eighty-seven".