61401405 has 16 divisors (see below), whose sum is σ = 105799680. Its totient is φ = 30228288.

The previous prime is 61401397. The next prime is 61401419. The reversal of 61401405 is 50410416.

It is not a de Polignac number, because 61401405 - 2³ = 61401397 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 157245 + ... + 157634.

It is an arithmetic number, because the mean of its divisors is an integer number (6612480).

Almost surely, 2^61401405 is an apocalyptic number.

61401405 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

61401405 is a deficient number, since it is larger than the sum of its proper divisors (44398275).

61401405 is a wasteful number, since it uses less digits than its factorization.

61401405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 314900.

The product of its (nonzero) digits is 480, while the sum is 21.

The square root of 61401405 is about 7835.9048615970. The cubic root of 61401405 is about 394.5112900591.

The spelling of 61401405 in words is "sixty-one million, four hundred one thousand, four hundred five".