5401781 has 24 divisors (see below), whose sum is σ = 7054272. Its totient is φ = 4017600.

The previous prime is 5401769. The next prime is 5401787. The reversal of 5401781 is 1871045.

It is a de Polignac number, because none of the positive numbers 2^k-5401781 is a prime.

It is a super-2 number, since 2×5401781² = 58358475943922, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 5401781.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5401787) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 73961 + ... + 74033.

It is an arithmetic number, because the mean of its divisors is an integer number (293928).

Almost surely, 2^5401781 is an apocalyptic number.

It is an amenable number.

5401781 is a deficient number, since it is larger than the sum of its proper divisors (1652491).

5401781 is a wasteful number, since it uses less digits than its factorization.

5401781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 153 (or 122 counting only the distinct ones).

The product of its (nonzero) digits is 1120, while the sum is 26.

The square root of 5401781 is about 2324.1731863181. The cubic root of 5401781 is about 175.4603498601.

The spelling of 5401781 in words is "five million, four hundred one thousand, seven hundred eighty-one".