1261170501 has 8 divisors (see below), whose sum is σ = 1682353920. Its totient is φ = 840383712.

The previous prime is 1261170499. The next prime is 1261170503. The reversal of 1261170501 is 1050711621.

It is an interprime number because it is at equal distance from previous prime (1261170499) and next prime (1261170503).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1261170501 - 2¹ = 1261170499 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1261170503) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 91656 + ... + 104513.

It is an arithmetic number, because the mean of its divisors is an integer number (210294240).

Almost surely, 2^1261170501 is an apocalyptic number.

It is an amenable number.

1261170501 is a deficient number, since it is larger than the sum of its proper divisors (421183419).

1261170501 is a wasteful number, since it uses less digits than its factorization.

1261170501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 198315.

The product of its (nonzero) digits is 420, while the sum is 24.

The square root of 1261170501 is about 35512.9624362711. The cubic root of 1261170501 is about 1080.4166490841.

The spelling of 1261170501 in words is "one billion, two hundred sixty-one million, one hundred seventy thousand, five hundred one".