1421428407738 has 16 divisors (see below), whose sum is σ = 2844376269696. Its totient is φ = 473556226880.

The previous prime is 1421428407703. The next prime is 1421428407769. The reversal of 1421428407738 is 8377048241241.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 63298431 + ... + 63320882.

It is an arithmetic number, because the mean of its divisors is an integer number (177773516856).

Almost surely, 2^{1421428407738} is an apocalyptic number.

1421428407738 is an abundant number, since it is smaller than the sum of its proper divisors (1422947861958).

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

1421428407738 is a wasteful number, since it uses less digits than its factorization.

1421428407738 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 126621189.

The product of its (nonzero) digits is 2408448, while the sum is 51.

The spelling of 1421428407738 in words is "one trillion, four hundred twenty-one billion, four hundred twenty-eight million, four hundred seven thousand, seven hundred thirty-eight".