31254121 has 2 divisors, whose sum is σ = 31254122. Its totient is φ = 31254120.

The previous prime is 31254103. The next prime is 31254133. The reversal of 31254121 is 12145213.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 24157225 + 7096896 = 4915^2 + 2664^2 .

It is a cyclic number.

It is not a de Polignac number, because 31254121 - 2⁹ = 31253609 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (31254101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15627060 + 15627061.

It is an arithmetic number, because the mean of its divisors is an integer number (15627061).

Almost surely, 2^31254121 is an apocalyptic number.

It is an amenable number.

31254121 is a deficient number, since it is larger than the sum of its proper divisors (1).

31254121 is an equidigital number, since it uses as much as digits as its factorization.

31254121 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 240, while the sum is 19.

The square root of 31254121 is about 5590.5385250439. The cubic root of 31254121 is about 314.9941075575.

Adding to 31254121 its reverse (12145213), we get a palindrome (43399334).

It can be divided in two parts, 31254 and 121, that added together give a triangular number (31375 = T₂₅₀).

The spelling of 31254121 in words is "thirty-one million, two hundred fifty-four thousand, one hundred twenty-one".