1403432421 has 16 divisors (see below), whose sum is σ = 1908088704. Its totient is φ = 917227584.

The previous prime is 1403432413. The next prime is 1403432431. The reversal of 1403432421 is 1242343041.

It is not a de Polignac number, because 1403432421 - 2³ = 1403432413 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1403432391 and 1403432400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1403432431) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 251160 + ... + 256686.

It is an arithmetic number, because the mean of its divisors is an integer number (119255544).

Almost surely, 2^1403432421 is an apocalyptic number.

It is an amenable number.

1403432421 is a deficient number, since it is larger than the sum of its proper divisors (504656283).

1403432421 is a wasteful number, since it uses less digits than its factorization.

1403432421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7180.

The product of its (nonzero) digits is 2304, while the sum is 24.

The square root of 1403432421 is about 37462.4134433434. The cubic root of 1403432421 is about 1119.6024367541.

Adding to 1403432421 its reverse (1242343041), we get a palindrome (2645775462).

The spelling of 1403432421 in words is "one billion, four hundred three million, four hundred thirty-two thousand, four hundred twenty-one".