412121557 has 2 divisors, whose sum is σ = 412121558. Its totient is φ = 412121556.

The previous prime is 412121543. The next prime is 412121663. The reversal of 412121557 is 755121214.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 359254116 + 52867441 = 18954^2 + 7271^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-412121557 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (412121537) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 206060778 + 206060779.

It is an arithmetic number, because the mean of its divisors is an integer number (206060779).

Almost surely, 2^412121557 is an apocalyptic number.

It is an amenable number.

412121557 is a deficient number, since it is larger than the sum of its proper divisors (1).

412121557 is an equidigital number, since it uses as much as digits as its factorization.

412121557 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2800, while the sum is 28.

The square root of 412121557 is about 20300.7772511301. Note that the first 3 decimals coincide. The cubic root of 412121557 is about 744.1750591310.

The spelling of 412121557 in words is "four hundred twelve million, one hundred twenty-one thousand, five hundred fifty-seven".