40261157 has 4 divisors (see below), whose sum is σ = 41559936. Its totient is φ = 38962380.

The previous prime is 40261103. The next prime is 40261213. The reversal of 40261157 is 75116204.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 40261157 - 2¹⁰ = 40260133 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 (40264157) 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, 649343 + ... + 649404.

It is an arithmetic number, because the mean of its divisors is an integer number (10389984).

Almost surely, 2^40261157 is an apocalyptic number.

It is an amenable number.

40261157 is a deficient number, since it is larger than the sum of its proper divisors (1298779).

40261157 is a wasteful number, since it uses less digits than its factorization.

40261157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1298778.

The product of its (nonzero) digits is 1680, while the sum is 26.

The square root of 40261157 is about 6345.1680040800. The cubic root of 40261157 is about 342.7378623677.

The spelling of 40261157 in words is "forty million, two hundred sixty-one thousand, one hundred fifty-seven".