1312230421 has 16 divisors (see below), whose sum is σ = 1395957760. Its totient is φ = 1230027120.

The previous prime is 1312230401. The next prime is 1312230487. The reversal of 1312230421 is 1240322131.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 1312230421 - 2¹¹ = 1312228373 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1312230401) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1666990 + ... + 1667776.

It is an arithmetic number, because the mean of its divisors is an integer number (87247360).

Almost surely, 2^1312230421 is an apocalyptic number.

It is an amenable number.

1312230421 is a deficient number, since it is larger than the sum of its proper divisors (83727339).

1312230421 is a wasteful number, since it uses less digits than its factorization.

1312230421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1624.

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 1312230421 is about 36224.7211307416. The cubic root of 1312230421 is about 1094.8048194335.

Adding to 1312230421 its reverse (1240322131), we get a palindrome (2552552552).

The spelling of 1312230421 in words is "one billion, three hundred twelve million, two hundred thirty thousand, four hundred twenty-one".