402123454 has 16 divisors (see below), whose sum is σ = 629719200. Its totient is φ = 192344544.

The previous prime is 402123443. The next prime is 402123461. The reversal of 402123454 is 454321204.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25482 + ... + 38125.

It is an arithmetic number, because the mean of its divisors is an integer number (39357450).

Almost surely, 2^402123454 is an apocalyptic number.

402123454 is a deficient number, since it is larger than the sum of its proper divisors (227595746).

402123454 is a wasteful number, since it uses less digits than its factorization.

402123454 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63747.

The product of its (nonzero) digits is 3840, while the sum is 25.

The square root of 402123454 is about 20053.0160823752. The cubic root of 402123454 is about 738.1078112583.

Adding to 402123454 its reverse (454321204), we get a palindrome (856444658).

The spelling of 402123454 in words is "four hundred two million, one hundred twenty-three thousand, four hundred fifty-four".