1297561606 has 32 divisors (see below), whose sum is σ = 2287097856. Its totient is φ = 545952000.

The previous prime is 1297561543. The next prime is 1297561627. The reversal of 1297561606 is 6061657921.

It is a super-2 number, since 2×1297561606² = 3367332242730598472, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25675 + ... + 57046.

It is an arithmetic number, because the mean of its divisors is an integer number (71471808).

Almost surely, 2^1297561606 is an apocalyptic number.

1297561606 is a deficient number, since it is larger than the sum of its proper divisors (989536250).

1297561606 is a wasteful number, since it uses less digits than its factorization.

1297561606 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82788.

The product of its (nonzero) digits is 136080, while the sum is 43.

The square root of 1297561606 is about 36021.6824426622. The cubic root of 1297561606 is about 1090.7100852451.

The spelling of 1297561606 in words is "one billion, two hundred ninety-seven million, five hundred sixty-one thousand, six hundred six".