1021431412 has 24 divisors (see below), whose sum is σ = 1885990400. Its totient is φ = 482702976.

The previous prime is 1021431391. The next prime is 1021431413. The reversal of 1021431412 is 2141341201.

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

It is a self number, because there is not a number n which added to its sum of digits gives 1021431412.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1021431413) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17389 + ... + 48427.

Almost surely, 2^1021431412 is an apocalyptic number.

It is an amenable number.

1021431412 is a deficient number, since it is larger than the sum of its proper divisors (864558988).

1021431412 is a wasteful number, since it uses less digits than its factorization.

1021431412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31495 (or 31493 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 19.

The square root of 1021431412 is about 31959.8406128691. The cubic root of 1021431412 is about 1007.0933691445.

Adding to 1021431412 its reverse (2141341201), we get a palindrome (3162772613).

The spelling of 1021431412 in words is "one billion, twenty-one million, four hundred thirty-one thousand, four hundred twelve".