1432401921 has 16 divisors (see below), whose sum is σ = 2131601920. Its totient is φ = 950648400.

The previous prime is 1432401907. The next prime is 1432401931. The reversal of 1432401921 is 1291042341.

It is a happy number.

1432401921 is a `hidden beast` number, since 1 + 432 + 40 + 192 + 1 = 666.

It is not a de Polignac number, because 1432401921 - 2⁶ = 1432401857 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1432401931) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 112930 + ... + 124971.

It is an arithmetic number, because the mean of its divisors is an integer number (133225120).

Almost surely, 2^1432401921 is an apocalyptic number.

It is an amenable number.

1432401921 is a deficient number, since it is larger than the sum of its proper divisors (699199999).

1432401921 is a wasteful number, since it uses less digits than its factorization.

1432401921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 238133 (or 238127 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

The square root of 1432401921 is about 37847.0860304991. The cubic root of 1432401921 is about 1127.2536016784.

It can be divided in two parts, 143240 and 1921, that added together give a square (145161 = 381²).

The spelling of 1432401921 in words is "one billion, four hundred thirty-two million, four hundred one thousand, nine hundred twenty-one".