402740071 has 4 divisors (see below), whose sum is σ = 402788752. Its totient is φ = 402691392.

The previous prime is 402740069. The next prime is 402740083. The reversal of 402740071 is 170047204.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 402740071 - 2¹ = 402740069 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (402740771) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8490 + ... + 29623.

It is an arithmetic number, because the mean of its divisors is an integer number (100697188).

Almost surely, 2^402740071 is an apocalyptic number.

402740071 is a deficient number, since it is larger than the sum of its proper divisors (48681).

402740071 is a wasteful number, since it uses less digits than its factorization.

402740071 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48680.

The product of its (nonzero) digits is 1568, while the sum is 25.

The square root of 402740071 is about 20068.3848627636. The cubic root of 402740071 is about 738.4848906397.

Adding to 402740071 its reverse (170047204), we get a palindrome (572787275).

The spelling of 402740071 in words is "four hundred two million, seven hundred forty thousand, seventy-one".