1420202540 has 24 divisors (see below), whose sum is σ = 2983145760. Its totient is φ = 567943808.

The previous prime is 1420202533. The next prime is 1420202591. The reversal of 1420202540 is 452020241.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 134576 + ... + 144744.

It is an arithmetic number, because the mean of its divisors is an integer number (124297740).

Almost surely, 2^1420202540 is an apocalyptic number.

1420202540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1420202540 is an abundant number, since it is smaller than the sum of its proper divisors (1562943220).

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

1420202540 is a wasteful number, since it uses less digits than its factorization.

1420202540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17161 (or 17159 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 20.

The square root of 1420202540 is about 37685.5746937737. The cubic root of 1420202540 is about 1124.0443017708.

Adding to 1420202540 its reverse (452020241), we get a palindrome (1872222781).

The spelling of 1420202540 in words is "one billion, four hundred twenty million, two hundred two thousand, five hundred forty".