1207490021 has 4 divisors (see below), whose sum is σ = 1246441344. Its totient is φ = 1168538700.

The previous prime is 1207490017. The next prime is 1207490051. The reversal of 1207490021 is 1200947021.

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 1207490021 - 2² = 1207490017 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 (1207490051) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19475615 + ... + 19475676.

It is an arithmetic number, because the mean of its divisors is an integer number (311610336).

Almost surely, 2^1207490021 is an apocalyptic number.

It is an amenable number.

1207490021 is a deficient number, since it is larger than the sum of its proper divisors (38951323).

1207490021 is an equidigital number, since it uses as much as digits as its factorization.

1207490021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38951322.

The product of its (nonzero) digits is 1008, while the sum is 26.

The square root of 1207490021 is about 34748.9571210418. The cubic root of 1207490021 is about 1064.8649114879.

The spelling of 1207490021 in words is "one billion, two hundred seven million, four hundred ninety thousand, twenty-one".