1420243146 has 144 divisors (see below), whose sum is σ = 3875062464. Its totient is φ = 387991296.

The previous prime is 1420243127. The next prime is 1420243147. The reversal of 1420243146 is 6413420241.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (1420243147) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 546426 + ... + 549018.

It is an arithmetic number, because the mean of its divisors is an integer number (26910156).

Almost surely, 2^1420243146 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1420243146, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1937531232).

1420243146 is an abundant number, since it is smaller than the sum of its proper divisors (2454819318).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1420243146 is a wasteful number, since it uses less digits than its factorization.

1420243146 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2647 (or 2628 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 27.

The square root of 1420243146 is about 37686.1134371800. The cubic root of 1420243146 is about 1124.0550144465.

Adding to 1420243146 its reverse (6413420241), we get a palindrome (7833663387).

The spelling of 1420243146 in words is "one billion, four hundred twenty million, two hundred forty-three thousand, one hundred forty-six".