1402640455 has 4 divisors (see below), whose sum is σ = 1683168552. Its totient is φ = 1122112360.

The previous prime is 1402640321. The next prime is 1402640461. The reversal of 1402640455 is 5540462041.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5540462041 = 149 ⋅37184309.

It is not a de Polignac number, because 1402640455 - 2¹⁹ = 1402116167 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 140264041 + ... + 140264050.

It is an arithmetic number, because the mean of its divisors is an integer number (420792138).

Almost surely, 2^1402640455 is an apocalyptic number.

1402640455 is a deficient number, since it is larger than the sum of its proper divisors (280528097).

1402640455 is an equidigital number, since it uses as much as digits as its factorization.

1402640455 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 280528096.

The product of its (nonzero) digits is 19200, while the sum is 31.

The square root of 1402640455 is about 37451.8418105171. The cubic root of 1402640455 is about 1119.3917974932.

The spelling of 1402640455 in words is "one billion, four hundred two million, six hundred forty thousand, four hundred fifty-five".