1405402004 has 6 divisors (see below), whose sum is σ = 2459453514. Its totient is φ = 702701000.

The previous prime is 1405402001. The next prime is 1405402069. The reversal of 1405402004 is 4002045041.

It can be written as a sum of positive squares in only one way, i.e., 924038404 + 481363600 = 30398^2 + 21940^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1405402001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 175675247 + ... + 175675254.

It is an arithmetic number, because the mean of its divisors is an integer number (409908919).

Almost surely, 2^1405402004 is an apocalyptic number.

It is an amenable number.

1405402004 is a deficient number, since it is larger than the sum of its proper divisors (1054051510).

1405402004 is a wasteful number, since it uses less digits than its factorization.

1405402004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 351350505 (or 351350503 counting only the distinct ones).

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

The square root of 1405402004 is about 37488.6916816258. The cubic root of 1405402004 is about 1120.1259435327.

Adding to 1405402004 its reverse (4002045041), we get a palindrome (5407447045).

The spelling of 1405402004 in words is "one billion, four hundred five million, four hundred two thousand, four".