131415121 has 2 divisors, whose sum is σ = 131415122. Its totient is φ = 131415120.

The previous prime is 131415113. The next prime is 131415199. The reversal of 131415121 is 121514131.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 131331600 + 83521 = 11460^2 + 289^2 .

It is a cyclic number.

It is not a de Polignac number, because 131415121 - 2³ = 131415113 is a prime.

It is not a weakly prime, because it can be changed into another prime (131410121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65707560 + 65707561.

It is an arithmetic number, because the mean of its divisors is an integer number (65707561).

Almost surely, 2^131415121 is an apocalyptic number.

It is an amenable number.

131415121 is a deficient number, since it is larger than the sum of its proper divisors (1).

131415121 is an equidigital number, since it uses as much as digits as its factorization.

131415121 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 120, while the sum is 19.

The square root of 131415121 is about 11463.6434435131. The cubic root of 131415121 is about 508.4112045056.

Adding to 131415121 its reverse (121514131), we get a palindrome (252929252).

The spelling of 131415121 in words is "one hundred thirty-one million, four hundred fifteen thousand, one hundred twenty-one".