1297486221 has 16 divisors (see below), whose sum is σ = 1737020736. Its totient is φ = 861480576.

The previous prime is 1297486219. The next prime is 1297486237. The reversal of 1297486221 is 1226847921.

It is not a de Polignac number, because 1297486221 - 2¹ = 1297486219 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1297486271) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1255521 + ... + 1256553.

It is an arithmetic number, because the mean of its divisors is an integer number (108563796).

Almost surely, 2^1297486221 is an apocalyptic number.

It is an amenable number.

1297486221 is a deficient number, since it is larger than the sum of its proper divisors (439534515).

1297486221 is a wasteful number, since it uses less digits than its factorization.

1297486221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2332.

The product of its digits is 96768, while the sum is 42.

The square root of 1297486221 is about 36020.6360438013. The cubic root of 1297486221 is about 1090.6889623502.

The spelling of 1297486221 in words is "one billion, two hundred ninety-seven million, four hundred eighty-six thousand, two hundred twenty-one".