3901549 has 4 divisors (see below), whose sum is σ = 3917980. Its totient is φ = 3885120.

The previous prime is 3901543. The next prime is 3901553. The reversal of 3901549 is 9451093.

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

It can be written as a sum of positive squares in 2 ways, for example, as 2418025 + 1483524 = 1555^2 + 1218^2 .

It is a cyclic number.

It is not a de Polignac number, because 3901549 - 2¹⁹ = 3377261 is a prime.

It is a Duffinian number.

3901549 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 3901549.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3901543) 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, 7854 + ... + 8335.

It is an arithmetic number, because the mean of its divisors is an integer number (979495).

Almost surely, 2^3901549 is an apocalyptic number.

It is an amenable number.

3901549 is a deficient number, since it is larger than the sum of its proper divisors (16431).

3901549 is a wasteful number, since it uses less digits than its factorization.

3901549 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16430.

The product of its (nonzero) digits is 4860, while the sum is 31.

The square root of 3901549 is about 1975.2339101990. The cubic root of 3901549 is about 157.4269283950.

The spelling of 3901549 in words is "three million, nine hundred one thousand, five hundred forty-nine".