1240578601 has 4 divisors (see below), whose sum is σ = 1241978112. Its totient is φ = 1239179092.

The previous prime is 1240578569. The next prime is 1240578613. The reversal of 1240578601 is 1068750421.

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, and also an emirpimes, since its reverse is a distinct semiprime: 1068750421 = 14633 ⋅73037.

It is a cyclic number.

It is not a de Polignac number, because 1240578601 - 2⁵ = 1240578569 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1240558601) 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, 698425 + ... + 700198.

It is an arithmetic number, because the mean of its divisors is an integer number (310494528).

Almost surely, 2^1240578601 is an apocalyptic number.

It is an amenable number.

1240578601 is a deficient number, since it is larger than the sum of its proper divisors (1399511).

1240578601 is an equidigital number, since it uses as much as digits as its factorization.

1240578601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1399510.

The product of its (nonzero) digits is 13440, while the sum is 34.

The square root of 1240578601 is about 35221.8483472972. The cubic root of 1240578601 is about 1074.5041451407.

The spelling of 1240578601 in words is "one billion, two hundred forty million, five hundred seventy-eight thousand, six hundred one".