401742787 has 8 divisors (see below), whose sum is σ = 408319056. Its totient is φ = 395183712.

The previous prime is 401742763. The next prime is 401742799. The reversal of 401742787 is 787247104.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-401742787 is a prime.

It is a super-2 number, since 2×401742787² = 322794533813054738, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (401742727) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 47913 + ... + 55669.

It is an arithmetic number, because the mean of its divisors is an integer number (51039882).

Almost surely, 2^401742787 is an apocalyptic number.

401742787 is a deficient number, since it is larger than the sum of its proper divisors (6576269).

401742787 is an equidigital number, since it uses as much as digits as its factorization.

401742787 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8597.

The product of its (nonzero) digits is 87808, while the sum is 40.

The square root of 401742787 is about 20043.5223201911. The cubic root of 401742787 is about 737.8748297444.

The spelling of 401742787 in words is "four hundred one million, seven hundred forty-two thousand, seven hundred eighty-seven".