1630070421 has 32 divisors (see below), whose sum is σ = 2616219648. Its totient is φ = 882615360.

The previous prime is 1630070419. The next prime is 1630070479. The reversal of 1630070421 is 1240700361.

It is not a de Polignac number, because 1630070421 - 2¹ = 1630070419 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1630070391 and 1630070400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1630070621) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 35911 + ... + 67451.

It is an arithmetic number, because the mean of its divisors is an integer number (81756864).

Almost surely, 2^1630070421 is an apocalyptic number.

It is an amenable number.

1630070421 is a deficient number, since it is larger than the sum of its proper divisors (986149227).

1630070421 is a wasteful number, since it uses less digits than its factorization.

1630070421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31681.

The product of its (nonzero) digits is 1008, while the sum is 24.

The square root of 1630070421 is about 40374.1305912586. The cubic root of 1630070421 is about 1176.8888698145. Note that the first 4 decimals are identical.

Adding to 1630070421 its reverse (1240700361), we get a palindrome (2870770782).

The spelling of 1630070421 in words is "one billion, six hundred thirty million, seventy thousand, four hundred twenty-one".