1400120421 has 8 divisors (see below), whose sum is σ = 2133516864. Its totient is φ = 800068800.

The previous prime is 1400120417. The next prime is 1400120437. The reversal of 1400120421 is 1240210041.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1400120421 - 2² = 1400120417 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1400120421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1400110421) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33336180 + ... + 33336221.

It is an arithmetic number, because the mean of its divisors is an integer number (266689608).

Almost surely, 2^1400120421 is an apocalyptic number.

It is an amenable number.

1400120421 is a deficient number, since it is larger than the sum of its proper divisors (733396443).

1400120421 is an equidigital number, since it uses as much as digits as its factorization.

1400120421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66672411.

The product of its (nonzero) digits is 64, while the sum is 15.

The square root of 1400120421 is about 37418.1830264378. The cubic root of 1400120421 is about 1118.7210158383.

Adding to 1400120421 its reverse (1240210041), we get a palindrome (2640330462).

The spelling of 1400120421 in words is "one billion, four hundred million, one hundred twenty thousand, four hundred twenty-one".