1260201557 has 4 divisors (see below), whose sum is σ = 1261898400. Its totient is φ = 1258504716.

The previous prime is 1260201521. The next prime is 1260201577. The reversal of 1260201557 is 7551020621.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1260201557 - 2³⁰ = 186459733 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1260201577) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 847307 + ... + 848792.

It is an arithmetic number, because the mean of its divisors is an integer number (315474600).

Almost surely, 2^1260201557 is an apocalyptic number.

It is an amenable number.

1260201557 is a deficient number, since it is larger than the sum of its proper divisors (1696843).

1260201557 is an equidigital number, since it uses as much as digits as its factorization.

1260201557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1696842.

The product of its (nonzero) digits is 4200, while the sum is 29.

The square root of 1260201557 is about 35499.3176976685. The cubic root of 1260201557 is about 1080.1398872872.

The spelling of 1260201557 in words is "one billion, two hundred sixty million, two hundred one thousand, five hundred fifty-seven".