1200642501 has 4 divisors (see below), whose sum is σ = 1600856672. Its totient is φ = 800428332.

The previous prime is 1200642497. The next prime is 1200642511. The reversal of 1200642501 is 1052460021.

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 not a de Polignac number, because 1200642501 - 2² = 1200642497 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 (1200642511) 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, 200107081 + ... + 200107086.

It is an arithmetic number, because the mean of its divisors is an integer number (400214168).

Almost surely, 2^1200642501 is an apocalyptic number.

It is an amenable number.

1200642501 is a deficient number, since it is larger than the sum of its proper divisors (400214171).

1200642501 is an equidigital number, since it uses as much as digits as its factorization.

1200642501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 400214170.

The product of its (nonzero) digits is 480, while the sum is 21.

The square root of 1200642501 is about 34650.2886135166. The cubic root of 1200642501 is about 1062.8481906759.

The spelling of 1200642501 in words is "one billion, two hundred million, six hundred forty-two thousand, five hundred one".