1405166402 has 4 divisors (see below), whose sum is σ = 2107749606. Its totient is φ = 702583200.

The previous prime is 1405166383. The next prime is 1405166407. The reversal of 1405166402 is 2046615041.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 2046615041 = 2549 ⋅802909.

It can be written as a sum of positive squares in only one way, i.e., 1317762601 + 87403801 = 36301^2 + 9349^2 .

It is not an unprimeable number, because it can be changed into a prime (1405166407) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 351291599 + ... + 351291602.

Almost surely, 2^1405166402 is an apocalyptic number.

1405166402 is a deficient number, since it is larger than the sum of its proper divisors (702583204).

1405166402 is an equidigital number, since it uses as much as digits as its factorization.

1405166402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 702583203.

The product of its (nonzero) digits is 5760, while the sum is 29.

The square root of 1405166402 is about 37485.5492423414. The cubic root of 1405166402 is about 1120.0633472886.

The spelling of 1405166402 in words is "one billion, four hundred five million, one hundred sixty-six thousand, four hundred two".