1400721734 has 4 divisors (see below), whose sum is σ = 2101082604. Its totient is φ = 700360866.

The previous prime is 1400721731. The next prime is 1400721757. The reversal of 1400721734 is 4371270041.

It is a semiprime because it is the product of two primes.

It is a junction number, because it is equal to n+sod(n) for n = 1400721697 and 1400721706.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1400721731) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 350180432 + ... + 350180435.

It is an arithmetic number, because the mean of its divisors is an integer number (525270651).

Almost surely, 2^1400721734 is an apocalyptic number.

1400721734 is a deficient number, since it is larger than the sum of its proper divisors (700360870).

1400721734 is an equidigital number, since it uses as much as digits as its factorization.

1400721734 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 700360869.

The product of its (nonzero) digits is 4704, while the sum is 29.

The square root of 1400721734 is about 37426.2172013149. The cubic root of 1400721734 is about 1118.8811461625.

Adding to 1400721734 its reverse (4371270041), we get a palindrome (5771991775).

The spelling of 1400721734 in words is "one billion, four hundred million, seven hundred twenty-one thousand, seven hundred thirty-four".