1420257240 has 96 divisors (see below), whose sum is σ = 4786825680. Its totient is φ = 378732672.

The previous prime is 1420257221. The next prime is 1420257257. The reversal of 1420257240 is 427520241.

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

It is a congruent number.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 63339 + ... + 82778.

Almost surely, 2^1420257240 is an apocalyptic number.

1420257240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1420257240 is an abundant number, since it is smaller than the sum of its proper divisors (3366568440).

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

1420257240 is a wasteful number, since it uses less digits than its factorization.

1420257240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 146143 (or 146127 counting only the distinct ones).

The product of its (nonzero) digits is 4480, while the sum is 27.

The square root of 1420257240 is about 37686.3004286704. The cubic root of 1420257240 is about 1124.0587326782.

Adding to 1420257240 its reverse (427520241), we get a palindrome (1847777481).

The spelling of 1420257240 in words is "one billion, four hundred twenty million, two hundred fifty-seven thousand, two hundred forty".