40742651 has 4 divisors (see below), whose sum is σ = 42147600. Its totient is φ = 39337704.

The previous prime is 40742617. The next prime is 40742657. The reversal of 40742651 is 15624704.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 40742651 - 2¹⁰ = 40741627 is a prime.

It is a super-2 number, since 2×40742651² = 3319927221015602, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (29), and also a Moran number because the ratio is a prime number: 1404919 = 40742651 / (4 + 0 + 7 + 4 + 2 + 6 + 5 + 1).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40742657) 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, 702431 + ... + 702488.

It is an arithmetic number, because the mean of its divisors is an integer number (10536900).

Almost surely, 2^40742651 is an apocalyptic number.

40742651 is a deficient number, since it is larger than the sum of its proper divisors (1404949).

40742651 is a wasteful number, since it uses less digits than its factorization.

40742651 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1404948.

The product of its (nonzero) digits is 6720, while the sum is 29.

The square root of 40742651 is about 6382.9970233426. The cubic root of 40742651 is about 344.0987497056.

The spelling of 40742651 in words is "forty million, seven hundred forty-two thousand, six hundred fifty-one".